DSLwebserver.com has a nice writeup on using Remote Desktop.  I've personally been using this setup for quite some time - it's been a lifesaver on more than one occasion.

"Ever wish that you could access your computer remotely from over the network or Internet?  If you are using Windows XP Professional, you can easily do that.  Using Remote Desktop, you can connect to your Windows XP Professional computer over the network or Internet and you'll have full control over your computer just as if you were sitting in front of it."