Please ready the Forum Guidelines and Rules. I adjusted your post. MAME does a pretty good job at this point for most roms. A good source for the games that MAME doesn't support yet or don't support well can be found at NonMAME. As far as the loader, I know there was an issue with one that released in the forums, if that's the one you're using? I know there was a release by another user but would have to search for that one. Also I would think the correct command-line would be as follows: ProjectTempestLoader.exe "[ROMPATH]\[ROMFILE]" You may have correct since you did say you're doing it from memory. Would have to see your config and also let us know the source of your loader so further testing can be done.