@Secret Squirrel
Believe it or not, it's the only sound-related credit. I did, however, notice that Mimori seems to be under JACK and BEANS and not HAL, but all the Pokemon Snap tracks are credited to "HAL Laboratory, Inc." on the back of the CD case, so I put that in parenthesis after the name just as I did for "Luna Umegaki (III)" for all those Inti Creates albums a few months ago.
http://www.youtube.com/watch?v=u9YtB8sotMU
http://www.mobygames.com/game/n64/pokmon-snap/credits
As for Acoustic Department, this is another European Nintendo OST in the same "serie" as the others they were involved in, and the remixes are the same kind of sound. Even though they aren't specifically credited, it's definitely them. I mean, who else could it be? It's one of those "inherently obvious" sort of things that come to you when you know enough about something.
http://www.youtube.com/watch?v=CQ4xJtK_iH0 - Track 31
http://www.youtube.com/watch?v=5CChEfUL798 - Track 32
http://www.youtube.com/watch?v=KkmlVyOxRTs - Track 33
http://www.youtube.com/watch?v=OX9G2Vfnnm0 - Track 34
http://www.youtube.com/watch?v=zWGvWNYBm5M - From Da Banana Bunch
N64Y2K Millenium Trax
http://www.youtube.com/watch?v=2rgcmp4lzxY - Track 6
http://www.youtube.com/watch?v=0ypAD5a1c70 - Track 7
http://www.youtube.com/watch?v=4Jqs6slcYwU - Track 8
http://www.youtube.com/watch?v=9EzVcg4kRts - Track 9
http://www.youtube.com/watch?v=nQBFHxWtkfc - Track 15