Because I haven't had time to really contribute the last couple of weeks, a list of the files in the TotSC key that aren't in the vanilla BG key. I didn't want to put any thought into it, so I just stripped the duplicates from the two keys, and then grep-ed the list against the TotSC list (there are some BG resources that were removed from the game for TotSC, thanks alot, BioWare). It ended up taking forfuckingever. The result is a hopefully accurate list of all the TotSC-only resources.
At some point I'm going to have to make an ALLOW_MISSING section of the tp2. Is there any (good, easy, etc.) way to determine whether a file is part of TotSC or not?
EDIT: Thanks to devSin, the list below should be fairly exhaustive.