my advice? buy a modchip that doessn't require patches!
if the game doessn't work, its always worth trying to move the system.cnf to LBA 12231, and maybe eaven patch the game... you can do that with cdgenps2 that is pritty easy to use...
i suppose your method of booting requires patches on most games, and most certenly on EA games... for EA games there is patches that should work for all of them...
i have never used a PS2 with that kind of mod, but why don't just try with patching the games that don't work? you find a lot of paches on: