Anyone tried this on a cube? is the performance acceptable? will it even run? (the connectix website lists a 500 MHz processor as the minimum -- so I'm curious if/how it runs on a 450 cube). Also, I've noted that connectix sells VPC with various copies of Dos and windows. Am I right that if I already have a spare (yes it's legal :) copy of windows I can get the cheaper dos version and install my copy of windows on it instead?