I would go for 1 or 2. You really don't want to be working on the main computer. Messing up something there means messing up your Amazing Charts. I've been having a few issues with 6.3.3 and II too. I've noticed that if I maximize the II window, AC Crashes. However if maximize most recent encounter or any other tab first, it does not crash. Or if I stretch the Window manually it doesn't crash. This is only II, everything else is fine. Does anyone else have this problem? I suspect it may be my video drivers. I'm going to find out this weekend.