Well when we look at piFBA on googlecode, when your in the pifba frontend : UP/DOWN/LEFT/RIGHT = scroll in the list A = Launch a rom (all except RED) X = help screen SELECT = options window START (double) = quit
ROMS COLOR: RED = missing ORANGE = clone rom detected YELLOW = parent rom detected or clone rom detected & parent rom detected GREEN = clone rom detected & parent rom detected & cache detected BLUE = parent rom detected & cache detected
So it may help you i think to find the option say earlier.
In case you have a keyboard connected, press [TAB] in the overview, move to "Listing view: All" and toggle the option with [lCtrl] to "Listing: Available only" or "Listing: Available with no clones"