READ THIS FIRST!!!
This tutorial will help you install iGamegear, igpSP, idarcnes, iPod Mame, and pretty much every other emulator except for iGens. It also installs rockbox and a few other applications.
Directions for step 1:
Go to http://www.box.net/shared/ygzh8rc45y and download iLaunch2.1 Folder Structure.zip. Extract the zip to the root of your iPod. Go to the root of your iPod and open the folder "iLaunch." Right-click the file "iDoom" and go back to the root of your iPod. Now open the folder "iDoom" then open the folder "Doom 1." Paste the file you copied earlier in this folder. It will ask you if you want to replace a file so click "yes." Go back to the root of your iPod and open the "iLaunch" folder again. Now delete the file "iDoom." Google "gba_bios.bin" and download it. (It should be the first link that shows up) Go back to the root of your iPod and open the folder "igpSP." Move the file "gba_bios.bin" to this folder.
Directions for step 2:
Go to http://www.rockbox.org and click the "current builds" link. Download and extract the correct rockbox build to the root of your ipod.
Directions for step 3:
Open up notepad and paste the following text into it:
Apple OS @ ramimg
iPodLinux @ (hd0,1)/linux.bin
Rockbox @ (hd0,1)/.rockbox/rockbox.ipod
iLaunch @ (hd0,1)/linux.bin /mnt/iLaunch/iLaunch
Disk Mode @ diskmode
Sleep @ standby
Click file,save as. In the save as type box, change it to "all files." Name the file "loader.cfg" and save it to the root of your iPod.
Congratulations, you're done!