Best way to map keyboard

[CSMR]

I'm looking to add extra symbols to my keyboard and map some duplicated ones (like the numbers on the numpad).
The maps will be into standard characters, rather than commands.
What's a good Windows program/driver to do this? AutoHotKey?

 

[Throckmorton]

Here is a list of programs

http://vlaurie.com/computers2/Articles/remap-keyboard.htm