How do I remap a key to a key-combination in the Windows 7 registry?
there are two options shown here at AutoHotKey: Remapping via the Registry's "Scancode Map" , might be what you are looking for...
(1) Use a program like KeyTweak (freeware) to visually remap your keys. It will change the registry for you.
(2) Remap keys manually by creating a .reg file (plain text) and loading it into the registry. This is demonstrated at www.autohotkey.com/forum/post-56216.html#56216