When running this program on Windows Vista please run it in compatibility mode for Windows XP SP2! It will run 1000x more stable! To do this just right click then hit properties, then hit the compatibility tab and choose Windows Xp Sp2 then hit apply. For some reason it is really unstable when run natively. Also Vista wireless internet users that have the Vista 60 second lag issue you should download this nifty program.
http://www.martin-majowski.de/wlanoptimizer/