I'm not sure if Clonezilla will give something usable in MAME, you might have to do it just with chdman, and there is probably a bios on the motherboard that will have to be dumped before it can be added, and it will have to be a few years old (I don't know when that came out). But you can upload the image in rar chunks to a file sharing site like sendspace and submit the links.