First, sorry for not reading this sooner Larry -- had a busy weekend.
In any case, the default for my iTunes is to list songs by different artists under different albums, even if the album tags line up. This happens unless I highlight them all, edit the tags under "Get Info" (with all selected still) and check "Part of a compilation". I've now done that and have one massive OCRemix album, which is what I wanted.
Benefit is that they all appear as one album as opposed to a few hundred different albums (which all have the same http://ocremix.org/ tag, but a separate album is created for each artist, leaving us with hundreds of albums by default).