First, did you enable the new sets in the fbaxxx.ini file? After you have run FBAXXX once, FTP into your XBox and find that ini file in the "ini" folder. Look for a line that says: bDisableLocked 1 Change the '1' to a '0' and that will enable the new sets. Now, do you plan to use RomCenter or ClrMAMEPro to check your ROMS? FBAXXX creates DATS for those when youlaunch it for the first time, but the first time you launch it you do not have the new sets anabled so they do not appear in the DATS. You need to FTP to you XBox and delete the DATS it created. Then restart FBAXXX after you have also enabled the new sets and it will make new DATS... these DATS will include information for the new sets.