Ok I'm fuxxored, and I don't get it - I can't even play it on my PC, I get the same error message. I just DL'd the latest 137 set, playing on the latest MAMEUI32 137 build! I don't get it! I've got five marble.zip files, named marble.zip and then 2 through 5. The unnumbered one is the largest, at 189 KB. I'm confused. Ed. The PC MAME does give the "mising ROM/CHD" message, but then will play the game after a moment of black screen. However, the N900 MAME just gives me a red box stating the "roms are missing", and forces the ROM to close after the next button press. So what gives? Maybe the bigger ROM hs some sort of dummy file that is satisfying the N900's MAME137?