u are right toothlord....
if u have passed all subjects and want to retake it, u have to retake the whole exam. if u are a partial failure then u can take one or two subjects instead of repeating the whole exam.
rams, remember that a lot of univs do not ask for part 2. in that case, your part 2 scores are only secondary to all other parts of ur appli. to have a strong appli, IMHO, u need to have the basic stuff they ask for.
eg: if a univ says minimum score of 85 in part 1 is reqd to apply - then u have to at least have 85 in part 1. a 90 in part 2 wont help too much. so if u plan to take anything, i would say it should be part 1. u seem to have a fair gpa, a good amount of work experience. so in most aspects your appli is pretty strong.
btw have u thought about nyu?