I can only work on a laptop right now. I have a super duper Dell Inspiron 3.4G processor, nice big 60G hard drive. However, I'm such a pig with all my content I need a firewire drive to hold my Runtimes-- except for the main P5 one of course. It works very well. I have a smaller one 2.5G, 40G HD which I will put less graphic proggies on as a backup. Same Firewire External though. The smaller one has a less successful screen. Too tiny and not standard enough Gamma. It's an Alienware. I prefer the Dell. The laptop is not the problem-- make sure you can get at least 1G memory, lots do it on 512, but I've had little luck. And check the comfort of the screen, mine is a widescreen,nearly 15 inch, actually maybe 15 wide but narrower height. Good Graphic card so I can run it at 1920 by 1200 pixels. Lets me do most render in the working window which saves on crashes. em Emily