hey everyone, ive been reading this forum for a while and everyone heres is extremely helpful. based on what i've read here, i think the 15" powerbook is for me. im excited about this because it will be my "switch" back to the mac. (my first mac was when i was seven in the 80's. the apple IIc...oh yeah!) im a music major in college and i'd be basically getting it for garageband, protools, logic(someday) and all the iLife stuff like making home movies/dvd's etc. but i just had a few questions: 1. do i need the 128mb VRAM for running those apps? 2. a 100 gb hard drive is probably an essential, right? 3. is it hard to install 2GB of RAM? is 2GB too excessive? will it void the warranty? i have opened up stereos and guitar amps but i've never opened a computer before. so i'd hate to ruin a beautiful powerbook. but it doesn't look like its all that hard. any tips? thanks everyone, sorry to ask like 800 questions. im just excited with the anticipation of dumping windows.