Desktop sharing

If all your PC's on the LAN are windows machines, then Install MS Netmeeting on them and enable 'Desktop Sharing' feature of netmeeting. make sure that you are the only one who knows the password for the sharing permissions, else users can turn intodoing hanky panky :)

else you have another option of using VNC, a pcAnywhere look alike, but only thing is that it is free. It works not only on Windows but on Linux too and you can access the remote desktop thro' your java enabled web browser too. check it out at
'http://www.uk.research.att.com/vnc/download.html'

You can use VNC it's free and easy to setup. http://www.uk.research.att.com/vnc/

or Timbuktu from netopia http://www.netopia

or use netop i think its from network associates.