An important thing to know is that this procedure install the froyo update.Zip file only if you have a stock model. The firmware is posted on official Google servers. Also, this will not work if you have a leaked update installed or if your phone is rooted. A guide for the rooted N1 will be available later this day.
For connecting to remote desktop of another computer (via internet or network) and controls. Also connecting to VNCServer through Repeater or directly to VNCServer and a lot of other configuration options. For more details VNCServer