Question about GBA Roms.

[Arix]

OK, i recently ordered EZF advance cart and link cable and downloaded some roms. I was wondering if there was anyway to edit a GBA Rom or extract teh stuff inside the rom, edit it and then repack, because i have a few games that are multi-language and are 16 megs, and i want to cut them down because a 256 mbit cart can hold 32 megs, and i have 4 games that i want to put on it (one 8 mb,three 16 mb) i just wanted to like remove some images or whole parts of the game that i totally dont need, especially the other languages in the multi-language ones.

 

If anyone can link to or tell me how i can do this, i'd greatly appreciate it.