Fast Resolution Switcher is generally useful in any situation where 2 desktop resulutions are used frequently. But most useful with an Ati card on WinXP where you can use virtual pan and scan desktop and   with 1024x600 native resolution Atom netbooks when 1024x768 required. Fast Resolution Switcher allows you to quickly change your real and virtual desktop resolution.
  Create a shortcut to the exe on your desktop or taskbar and at the target field give the two resolutions as command line parameters eg. disp_switch.exe 1680x1050 2400x1050. Click on the shortcut to alternate between the 2 resolutions.