Double click on "ControlLock.reg" and then reboot to turn the "Caps Lock" key into a "Control" key.  To reverse, use regedit.exe to delete this entry from the registry.

Based on info from:

http://vim.sourceforge.net/tips/tip.php?tip_id=75



Tip #75: Remap CAPSLOCK key in Windows 2000 Professional and NT4.0

  tip karma    Rating 12/8, Viewed by 346


 created June 7, 2001 5:54 complexity  basic

 author  Igor Prischepoff as of  5.7



 If you're Windows 2000 Professional user and got tired to move your hands off basic row
 when hitting <ESC> key 
 here the solution (not for Windows 9x.): 
 remap CapsLock key as <ESC> key. It's located in useful position. 
 Put this lines into <EscLock.reg> file and start it in explorer.Reboot.Enjoy. 

 REGEDIT4 
 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Keyboard Layout] 
 "Scancode Map"=hex:00,00,00,00,00,00,00,00,02,00,00,00,01,00,3a,00,00,00,00,00 

 To restore you capslock back just delete this entry from Registry and reboot. 
 And below is remapping <capslock> as <Left Control>: 

 REGEDIT4 
 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Keyboard Layout] 
 "Scancode Map"=hex:00,00,00,00,00,00,00,00,02,00,00,00,1d,00,3a,00,00,00,00,00