Lol, I could imagine your house with all three robots running. Is Roomba any good? I actually thought of buying one for actually cleaning the house..(my other idea is attach lego mindstorms to a black and decker but that didn't fly..)

About your pc freezing, it's a long shot but consider installing the omega drivers for that Mobility 7500. I had the same gfx card once and there where several issues with it and Gamestudio. I know it worked with A6.6, but some change in A7 might have re-surfaced the problem. Happens all the time here