The ROM images that come with the V41 are in an uncompressed format like CCD1B.ROM (the CCD module). The ROM images used with Emu41 are in a compressed format like GAMES.BIN (the Games Pac). I know how to convert from .ROM to .BIN but not the other way around. The utility you mention is for converting USER code programs, and can't (as far as I know) convert a whole image.