How to add Roms:
1. Unpack GBAdvance_ (PS2) .pkg using FAKE_PKG_Generator ;
2. Open Image / disc01.iso using CDGenPS2 v3 ;
3. Place all your roms files in the ROMS folder ;
4. Generate a new iso named disc01.iso with your roms files within ;
5. Repack the Fpkg with the new generated disc01.iso...