Make sure you test out your roms first in Final Burn Alpha on a Windows machine. I think if you read a couple of posts back, make sure to set Options to filter your roms right.
PS3 Slim Rogero CFW 4.40 v1.03 (500GB internal HDD)
Sony Bravia 1080p HDTV. iMac 10.8.2. Popcorn Hour A-300