Frequently, you get a file not found error on mame4iphone. Not sure if this is already on the forums, as i serarched and didnt find anthing. If your ROM works on the PC MAME emulator without a BIOS, go to http://www.zodttd.com/forums/showthread.php?t=4192 (ZodTTD's compatibilty list) and look for it. If it is there, the zip file name should match the beginning of the file. e.g. While loading Arkanoid (US), you get a error (file not found). The zip file is called Arkanoid.zip. ON ZodTTD's list, it says arknoidu "Arkanoid (US)" on the entry. arknoidu is the ROM name so instead on the zip file being called Arkanoid.zip, it should be called arknoidu.zip Please dont flame me if this is listed somwhere else. Leave a message if this helps!