hello, i have a 500 GB mybook WD external HD that I've been using for my large amounts of music, movies, etc. It's worked fine for iTunes, iPhoto, etc. but even with all of this media on my external, my Powerbook's HD has begun to fill up. I've done all of the language and other cleaning programs to create a bit of room, but I have probably 20-30 apps that I could use without having immediately. I'm wondering, is it possible to load up all of these on to my external without having to reinstall all of them? I would be doing the same for new programs, so if I bought CS3 could I install it on my external and just run it from there? Would I have to partition my drive, or can it remain just how it is? I'm pretty clueless as to how this would work, so any help would be appreciated. Thanks.