Well if you want to use RDP (mstsc) than you will need to have port 3389 open on your firewall/router and pointed to your machine. Also you will need 3389 to be available outbound from the network you are connecting on. TO download RDP for a Windows 2000 machine you can google for "Download Remote Desktop Protocol".

Being a Network Engineer, I would use Logmein over this method any day.