I found a Win2K Server configuration HOWTO that led you through a "Routing and Remote Access Services" (RRAS) configuration wizzard to set up VPN, but they said that it was only on 2K Server. I found "Routing and Remote Access Services" in the management console in XP Pro and enabled it but the only options I have are "Start," "RESTART," "STOP" and "PAUSE" with no way to configure VPN. I'm sure Windows.net Server will be WAAAAAY too expensive for me... But that looks like the only way beyond buying and setting up a dedicated VPN device.