I'm using an M3 DS Real. It's old, I know, but it's been faithful for me, and I DID get it working a year ago... not sure how, though (I've reformatted several times since, so I don't know like if there was any special settings I did).I'll try XP Compatibility next time I try running it, hopefully that works. It is a program from 2003 so I'm not shocked if that's why it isn't working properly on Win7.
The slot 1 cart it crashed on was a SuperCard DSTwo.