The Kingdom Hearts Chain of Memories Arranged Album project was kicked off by blue.nocturne on our forums. To quote him:

I was pretty annoyed when I discovered that there was not going to be a KH:CoM soundtrack, so the next best thing was to do it myself. I started by doing midis at first, they were not completely accurate since it's difficult to hit every single note, but they overall helped me obtain a sense of what type of mood Yoko Shimomura was trying to set up. Then I decided to do MP3 quality versions, but since it was necessary to get every single precise note, ripping them was pretty much necessary. These are not purely rips though, I then had to assign correct/better suited instruments and balance every single song until it sounded more like Kingdom Hearts I. This is of course a "Soundtrack" project, so I tried to stay away from changing notes, and tried to only vary volume and expression.