goto www.gp32emu.com and they have some nice guides there.
You need the gp32 xvid codec, so don't just google it.
Get everything on www.gp32eu.com , under utilities tab on the top
It has
Virtualdub with gp32 configuration (just load settings, gp32.vfd under file menu)
XVID for gp32
GPCINEMA free version
If you are going from dvd to gp32,
use smartripper 2.41 (google it)
and get virtualdub mod! (it can read dvd files directly after smartripper)
Most of the tutorials expect the file is already divx/avi.
Use this setup for dvds.
Nice to have you join us.
mth411