VNC stands for Virtual Network Computing. It is, in
essence, a remote display system which allows you to view
a computing 'desktop' environment not only on the machine
where it is running, but from anywhere on the Internet
and from a wide variety of machine architectures.
Download for free here
http://www.realvnc.com/
Well, for one thing, it's free.. and rather quick
too. You will need to install it on each machine.. Have
the remote user give you their IP which can be obtained
by rolling over the VNC icon in the task bar. then,
type it in and your off..