Todd, I think you'd be alright if you installed it on two different computers, and never "synched". Though, it is probably against the TOS license, so I can't recommend it! I do know there is no facility to use the same copy on the same PC with more than one account. I also know that you can synch the same user on different PCs (i.e. having FitDay PC installed on your home computer and your work computer). Hope this helps!
47 M 5'8"
May 4, 2010...... 440? lbs. (Start FitDay Size 60 Jeans)
June 19, 2010.... 393 lbs. (First Weigh-in)
June 19, 2011.... 229 lbs. (164 lbs. gone in one year :-)
Current Weight... 185 lbs. (Size 36 Jeans)
Next Goal 169 lbs. (07/04/12)
Ultimate Goal 165 lbs. (12/31/12)
The best exercises for weight loss are Fork Putdowns and Table Pushaways.