Did you use multitracks or did you edit?
They were ripped from the game Rockband I don't know by who but they weren't exactly the official multitracks. On some tracks there would be diffident instruments mixed together. Like on Satisfy My Soul the lead guitar, background vocal, keys, horns, percussion were all on the same track. Others like the Bass would be on it own track. Each song is different but generally there were about 6 stereo tracks to work with.
are these in any way "official" mixes?
Definitely not, I am just a bootlegger trying to get my name out there. I don't make money from my mixes yet and so I believe the work I do should be available free without restriction. I do believe it is wrong If someone does unauthorized remixes and tries to make money from them.