Unfortunately, I don't actually have that much information for you, either. I hadn't been too concerned about registering, yet, and just received a letter in the mail about who to contact to make that happen. From my understanding, all mph students take basically the same classes in the first semester, so I don't think it should be that much of a problem in terms of getting into the classes that you want. I've only gotten as far as making sure that I can sign into myUAlbany. I'll keep you posted if I find anything out - or if you find out that I should be more stressed than I am, please let me know.
In terms of financial aid, you're also ahead of me there. I wasn't expecting to receive any of the money until after school started, including the stipend. Maybe you have worked something out with them different than my situation? I'm also working on loans to go with the money they are giving me, but I haven't gotten very far. Sorry I can't be more help - I'll let you know if I find anythin gout.