My wife is going to need the option to "VPN" to the hospital's network to look at her patient's charts occasionally. I have no idea what VPN is and how she is supposed to do it but I understand from one of her coworkers is that she is going to need Windows on our MBP. (Her coworker does it with Boot Camp I believe) I have Parallels 4.0 and of course Boot Camp but we have not setup either of them. So I have some questions. 1. Can someone explain to me what VPN is? 2. Does she really need Windows in order to VPN to the hospitals in our area so she can look up patient information or can Mac OSX do that? 3. If Windows is needed will XP work or do we need Vista? 4. Will Parallels allow her to VPN into the hospital networks or should we go for Boot Camp?