I received a virtual game cabinet recently that plays PinballFX, PinballX and MAME games. There is a selection of each already loaded on the machine, and they play well.

I want to add some MAME games, so I downloaded the ROM's I needed and put them in the MAME\roms directory. Then I configured PinballX (under the arcade sub menu) with the name of the game, and pointed PinballX to the rom file. The name of the game shows up in the wheel display, but when I select the game, I get all sorts of missing rom messages.

Is there a resource that shows how to add MAME and other pinball games to my cabinet?