A powerful utility for extracting data from various file formats can now be found on Aminet. It is a simple one with lots of file formats that it supports. If you use Dopus Magellan or Ambient you can configure this tool easily together with the usage of the file listers that these provide.

You can extract files from all of these formats with Deark

abk            AMOS resource (AmBk, sprite, icon, AmBs)
alias_pix      Alias PIX image, Vivid .IMG
alphabmp       Alpha Microsystems BMP
amiga_adf      Amiga disk image
amiga_dms      Amiga DMS disk image
amigaicon      Amiga Workbench icon (.info), NewIcons, GlowIcons
amos_source    AMOS source code
anim           IFF-ANIM animation
animatic       Animatic Film
animator_pic   Autodesk Animator PIC/CEL
ansiart        ANSI Art character graphics
apm            Apple Partition Map
applesd        AppleSingle/AppleDouble
applevol       Apple volume label image
ar             ar archive
arc            ARC compressed archive
arcfs          ArcFS (RISC OS archive)
arcmac         ArcMac compressed archive
arj            ARJ
artworx_adf    ArtWorx Data Format (ADF)
arx            ARX LHA-like archive
ascii85        Ascii85
asf            ASF, WMV, WMA
atari_pi7      Atari PI7 image
atr            ATR Atari floppy disk image
autocad_slb    AutoCAD Slide Library
awbm           Award BIOS logo
base16         Base16
base64         Base64
basic_c64      Detokenize C64 BASIC
binhex         Macintosh BinHex (.hqx) archive
bintext        Binary Text character graphics
bld            MegaPaint BLD
bmff           ISO Base Media File Format
bmi            Zoner BMI bitmap
bmp            BMP (Windows or OS/2 bitmap)
bob            Bob Ray Tracer bitmap image
bpg            BPG (Better Portable Graphics)
bsave          BSAVE/BLOAD image
bytefreq       Print a byte frequence analysis
cab            Microsoft Cabinet (CAB)
car_lha        CAR (MylesHi!) LHA-like archive
cardfile       Windows Cardfile address book
cd_raw         Raw CD image
cdr_wl         CorelDRAW (old WL format)
cfb            Microsoft Compound File Binary File
coke           Atari Falcon COKE image (.TG1)
compfacei      Compface intermediate format
compress       Compress (.Z)
copy           Copy the file unchanged
corel_bmf      Corel Gallery BMF
corel_ccx      Corel CCX
corel_clb      CorelMOSAIC .CLB library
cp437          Code Page 437 text
cpio           cpio archive
crc            Calculate various CRCs
crg            Calamus Raster Graphic
crlzh          CRLZH (CP/M)
crunch         Crunch (CP/M)
crush          CRUSH archive
d64            D64 (C64 disk image)
dclimplode     PKWARE DCL Implode compressed file
dcx            DCX (multi-image PCX)
degas          Atari DEGAS or DEGAS Elite image
deskmate_pnt   Tandy DeskMate Paint
dib            DIB (raw Windows bitmap)
dlmaker        DL animation (DL MAKER)
doodle         Atari Doodle
drhalocut      Dr. Halo .CUT image
dsstore        Mac Finder .DS_Store format
dwc            DWC compressed archive
ea_data        EA DATA (OS/2 extended attributes)
ebml           EBML
eggpaint       Atari EggPaint .TRP
emf            Enhanced Windows Metafile
epocimage      EPOC/Symbian MBM, Sketch, AIF
eps            Encapsulated PostScript
exe            EXE executable (PE, NE, etc.)
falcon_xga     Atari Falcon XGA image
farbfeld       farbfeld image
fat            FAT disk image
flac           FLAC
fli            FLI/FLC animation
fnt            Windows FNT font
fp_art         PFS: 1st Publisher clip art (.ART)
fpaint_pi4     Atari Falcon PI4 image
fpaint_pi9     Atari Falcon PI9 image
ftc            Atari Falcon True Color .FTC
gemfont        GEM bitmap font
gemmeta        GEM VDI Metafile
gemraster      GEM VDI Bit Image, a.k.a. GEM Raster
gif            GIF image
godpaint       Atari Falcon GodPaint
graspfont      GRASP font
graspgl        GRASP GL animation
grob           GROB - HP48/49 calculator image
gws_thn        Graphic Workshop thumbnail .THN
gzip           gzip compressed file
hexdump        Print a hex dump
hfs            HFS filesystem image
hlp            HLP
hpi            Hemera Photo-Object image
hpicn          HP 100LX/200LX .ICN icon
hr             TRS-80 HR (High Resolution) image
hs2            HS2 (POSTERING)
hsiraw         HSI Raw
iccprofile     ICC profile
icns           Macintosh icon
ico            Windows icon/cursor
iff            IFF (Interchange File Format)
iim            InShape IIM
ilbm           IFF-ILBM and related image formats
indypaint      Atari IndyPaint .TRU
insetpix       Inset .PIX image
iptc           IPTC-IIM metadata
is_z           InstallShield Z
iso9660        ISO 9660 (CD-ROM) image
j2c            JPEG 2000 codestream
jbf            PaintShop Pro Browser Cache (pspbrwse.jbf)
jovianvi       Jovian Logic VI
jpeg           JPEG image
jpeg2000       JPEG 2000 image
jpegscan       Extract embedded JPEG images from arbitrary files
lbr            LBR archive
lha            LHA/LZH/PMA archive
loaddskf       LoadDskF/SaveDskF disk image
lss16          SYSLINUX LSS16 image
lumena_cel     Lumena CEL
lzwcom         LZWCOM compressed file
macbinary      MacBinary
macpaint       MacPaint image
macrsrc        Macintosh Resource Manager
makichan       MAKIchan graphics
mdesk_icn      Magic Desk icon
megapaint_lib  MegaPaint Symbol Library
megapaint_pat  MegaPaint Patterns
midi           MIDI audio
monkeys_audio  Monkey's Audio (.ape)
mpegaudio      MP3 / MPEG audio
mrw            Minolta RAW
msa            MSA - Atari ST floppy disk image
mscompress     MS-DOS Installation Compression
msp            Microsoft Paint image
mswordscr      MS Word for DOS Screen Capture
neochrome      Atari NEOchrome image
newprintshop   The New Print Shop .POG/.PNM
ngg            Nokia Group Graphic
nie            NIE/NII/NIA (Naive Image Formats)
nlm            Nokia Logo Manager bitmap
nol            Nokia Operator Logo
npm            Nokia Picture Message
nrg            NRG CD-ROM image
nsl            Nokia Startup Logo
null           Do nothing
ogg            Ogg multimedia
olpc565        OLPC .565 firmware icon
os2bmp         OS/2 icon (.ICO), cursor (.PTR), bitmap array
pack           Unix pack (.z)
packdir        PackDir compressed archive format
palmbitmap     Palm BitmapType
palmdb         Palm OS PDB
palmrc         Palm OS PRC
pasti          Pasti - Atari ST floppy disk image
pcf            PCF font
pcpaint        PCPaint PIC or CLP image
pcx            PCX image
pf_pgf         Atari Portfolio Graphics - uncompressed
pff2           PFF2 font
pgc            Atari Portfolio Graphics - compressed
pgx            Atari Portfolio animation
pict           Macintosh PICT
pkfont         PK Font
pkm            PKM (GrafX2)
plaintext      Plain text
plist          .plist property list, binary format
pm_xv          PM (XV)
png            PNG image
pnm            Netpbm formats (PNM, PBM, PGM, PPM, PAM)
pp_gph         PrintPartner .GPH
printmaster    PrintMaster .SHP/.SDR
printshop      The Print Shop .DAT/.NAM
prismpaint     Atari Prism Paint .PNT, a.k.a. TruePaint .TPI
ps_action      Photoshop Action
ps_brush       Photoshop Brush
ps_csh         Photoshop Custom Shape
ps_gradient    Photoshop Gradient
ps_pattern     Photoshop Pattern
ps_styles      Photoshop Styles
psd            Photoshop PSD
psf            PC Screen Font
psionapp       Psion .APP/.IMG and .OPA/.OPO
psionpic       Psion PIC, a.k.a. EPOC PIC
qdv            QDV (Giffer)
qtif           QTIF (QuickTime Image Format)
riff           RIFF-based formats
ripicon        RIP/RIPscrip/RIPterm Icon / BGI image
rm             RealMedia
rodraw         RISC OS Draw, Acorn Draw
rosprite       RISC OS Sprite, a.k.a. Acorn Sprite
rpm            RPM Package Manager
rsc            GEM resource file
shg            SHG (Segmented Hypergraphics), MRB (Multiple Resolution Bitmap)
sis            SIS (EPOC/Symbian installation archive)
spark          Spark archive
spectrum512c   Spectrum 512 Compressed
spectrum512s   Spectrum 512 Smooshed
spectrum512u   Spectrum 512 Uncompressed
split          Split the file into equal-sized chunks
squash         Squash (RISC OS compressed file)
squeeze        Squeeze (CP/M)
stos           STOS Memory Bank (.MBK)
stuffit        StuffIt archive
sunras         Sun Raster
swg            SWAG packet
t64            T64 (C64 tape format)
tar            tar archive
tga            Truevision TGA, a.k.a. TARGA
tiff           TIFF image
tim            PlayStation graphics
tinystuff      Atari Tiny Stuff, a.k.a. Tiny image format
tivariable     TI calculator variable or picture file
unifont_hex    GNU Unifont HEX font
uuencode       UUEncode
vbm            C64/128 VBM (VDC BitMap)
videomaster    Video Master (.flm/.vid/.vsq)
vitec          VITec image format
vort           VORT ray tracer PIX image
wad            Doom WAD
win1ico        Windows 1.0 icon/cursor
winzle         Winzle! puzzle image
wmf            Windows Metafile
woz            WOZ floppy disk image
wpg            WordPerfect Graphics
wri            Microsoft Write
xbin           XBIN character graphics
xface          X-Face icon/avatar
xpuzzle        X11 "puzzle" image
xxencode       XXEncode
ybm            Bennet Yee's face format, a.k.a. YBM
zbr            ZBR (Zebra Metafile)
zip            ZIP archive
zlib           Raw zlib compressed data
zoo            Zoo compressed archive format
zoo_filter     Zoo filter format
zoo_z          Zoo Z format
zsq            ZSQ (ZSQUSQ, LZW-compressed file)

Thanks to Jason Summers for this package. It is free to download from Aminet. Read the readme file on how to use this tool in both AmigaOS and MorphOS. You can also use it to see the content of the packages before extracting them. So, if you are into Shell / CLI commands this is the tool for you.

It is a nice tool for extracting. Give it a go.