Make a shortcut on the desktop to CMD.EXE
Right-click the shortcut, select properties
Click the Shortcut tab
Click in the Shortcut Key box (it will say none to start with)
Press the control key and the key you want to be the hotkey.
(Don't use a key that is already used by another program or windows!)
Click Apply, then Ok.
The hotkey will be Ctrl + Alt + (Yourkey)
Try it out.