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.