X-win32 with Putty
Run X-Win32 on your PC (All Programs -> X-Win32 6.0 -> X-Win32) 
If you haven't already, download putty from here 
Run putty 
In putty, type: cluster.cs.columbia.edu in the "Host Name" field. 
Click on "Connection" -> "SSH" -> "Tunnels" 
Check the box for "Enable X11 forwarding" 
Go back to "Session" 
Type: CS Cluster into "Saved Sessions" 
Click "Save" to save it for subsequent use. 
Click: "Open" button. A new window should appear. 
Type in your username and password to log in 
Once you are logged into cluster, type: "xterm&" and you should see the Xterm window open. (Sometimes the Xterm window opens in the behind all the other windows.) 
Any X GUI program such as Matlab or Mathematica will open a new window if you run it from the command line.
X-Win32  –  www.cs.columbia.edu/...
http://www.google.com/notebook/public/0489008055096
4041631/BDRwQSwoQlpOGhLsh#SDRgMSwoQoe_d7sgh