Access your PC through the Internet

I bet everyone is familiar with Windows Remote Desktop, I tried it before but it wasn't that useful !!
its got an issue were the current user on the computer logs out & the one remotely accessing the computer logs in.
well I was told that there was another way to remotely access the computer through another program without causing the one using the computer to log out, the Program is UltraVNC (Google it to download it, its free).
I've tried it its very very useful, specially that u can access the computer through a website, as long as the computer u are using has the JRE installed (Java Runtime Environment) which isn't a big deal.
so u wont need to install anything extra on every computer u use to access ur computer.
To make things work perfectly u'll either need a static IP on ur machine
OR
register on www.no-ip.com, make an account, create a domain & install their client on ur computer (the client updates the Domain(s) that u created with the new IP every duration that u set, so when the IP is changed the domain is also updated (Cool huh ?? :D)
its totally free, & its very useful to do anything, its like a netmeeting session but both are using the mouse & have complete control over the computer.

That no-ip domain was very useful to me accessing any web-interface for any application I have (emule, uTorrent *new feature*)
--- Tech Details ---
UltraVNC installes a display adapter, that captures the screen & sends it to the connected clients.
it works great on almost all Microsoft OSs, except on VISTA it will disable ur Aero theme :(

The no-ip client that u installed is prefered to run as a system service & not in the startup, the IP will be updated ONLY when the GUI is closed, (I suppose not even in the system tray)

& DONT FORGET TO SET THE PORTS ON THE ROUTER !!!!!!!