Remote access should only be done on a secured LAN/VPN and not over the open internet unless other security measures are taken (e.g. ssh etc.). What about RealVNC, Windows Remote Desktop or NetMeeting (or equivalent) desktop sharing? I think our IT crowd use something called DameWare for taking remote control but I don't know much about it.
I did point out the potential security issues of any remote desktop access mechanism. As far as I recall there are ways to integrate VNC with something like OpenSSL or SSH or the like and maybe even packaged versions of same.