1st part, (installing Linux Mint PPC on your PowerPC Macintosh) http://bitbin.it/oK8X7uZf

Type in the command on a terminal (without quotes) and press enter

HP printers support: "sudo apt-get install hplip-gui hplip"

DVB USB television support: "sudo apt-get install me-tv w_scan"

Web browser: "sudo apt-get install luakit iceape"
Luakit guide https://github.com/mason-larobina/luakit/wiki/Beginner-Guide

Mail client: "sudo apt-get install sylpheed"

Office Suite: "sudo apt-get install libreoffice"

Video Player: "sudo apt-get install vlc"

Vector graphics: "sudo apt-get install inskcape"

Youtube Browser: "sudo apt-get install minitube"

GBA/Genesis/Lynx/Nes emulator: "sudo apt-get install mednafen"

Faster nes emulator: "sudo apt-get install gfceux"

PSX emulator: "sudo apt-get install pcsxr"

ZX/Amiga/MSX/C64 emulators (sorted) "sudo apt-get install fuse-emulator-gtk e-uae openmsx-catapult vice"

68k Macintosh emulator, yep ;) : "sudo apt-get install   basilisk2" 

MAME: "sudo apt-get install sdlmame gnome-video-arcade"

Misc Games: "sudo apt-get install lincity-ng openttd* abuse abuse-sfx wesnoth wesnoth-music frozen-bubble prboom assaultcube"

FINAL STUFF: Search in MintPPC's menu for "Openbox preferences" or such, and disable all window animations.