Yeah I've been doing this and it seems to work well. What would be better is the concept of having multiple artists per song, as was discussed a while back on the BBS. ID3v2 supports this, and the empeg guys had at least talked about the possibility implementing it in the future. So in your case, "I'm Real" would have both J Lo and Ja Rule as artists, so it'd come up in searches on both of those artists.