I have a friend who has a couple macs and I think a couple of windows pcs/laptops. I think he has managed to get a kind desktop sharing working accross these machines where he can just connect from his mac to a windows machine and immediately see the current operation of the windows pc on his mac and if he wants, take over the windows oc, move the mouse etc.

To achieve this he didn't install any software any where, but just joind the computers to the network and shared the drives.

I don't have a mac, but the way I have been doing this with my windows pc network is by using something like realvnc which needs you to install a server on each pc you want to connect to. I'd like to be able to do what he does so I just use the OSs but I can't seem to get it to work. Any one give me some help?