Nice approach with the Script Creator to enable people that are not too geeky to create keymappings for the Wii controllers.
Two remarks though:
First: You should really not include the .NET framework as this bloats the downloadsize immensly. Even today lots of people have to depend on smallband connections to the internet and for those the DL is somewhat big. The newer .NET frameworks are often included on cover CDs or the like (you can of course always offer the framework as an additional download).
Second: What I am missing is the possibility to combine Wiimote and Nunchuck-actions for keymaps. For example map
Nunchuk-Left to
A but
only if
Nunchuk-Z is pressed. I use this with GlovePie: Stick moves, plus Z rotates, plus C zooms.
If you could add that possibility it would be a great improvement.
Is it possible to get the source? Whats it written in? VC, VC# or VB?