Keyboard remapper with fn key support?

[xStil]

My new Windows 7 laptop does not have a numpad , not even for the fn key. I am looking for a keyboard remapper that can quickly change my 'keyboard map' from one that replaces some of my keys with a numpad back to normal and vice-versa (i.e. one that does not require me to reboot). Alternatively, one that has support for the fn key next to my 'left ctrl' will also do.

Any help appreciated!

[Zren]

http://www.autohotkey.com

If your going to remap the keys, personally I wouldn't make it need to press fn. Just whenever you need to use a number pad, run the AHK script and close it when your done.