why partition it? you could just have a folder in the root of the drive for Video and another for Audio and separate them that way. Then, if you end up using more than 100GB for video (or 67GB for audio) you aren't restricting yourself with partitions. As for the existing drive, it seems like quite a chore to move everything off of it, partition it, and move everything back onto it, and then make a copy of your boot drive onto it. perhaps it works better, but what i did was put a 5GB partition on my 120GB drive where, in the future, i can install OS X if i need and access the PowerBook's internal drive like that.