Stranzini, it's easy.
Options -> Controls -> button at the top (I forgot it's name)
In there you have all the keyboard shortcuts, just remap them to your heart's wish.
I remapped them to my Counter-Strike keys (W runs, S walks, X walks backwards).
About the keyboard, you know one thing that ticks me off with NWN? Lack of support for compound keys (Ctrl-F1, for example), extended keyboards and mice. I have 24 F-keys on my keyboard (standard 12 plus 12 "MS Office" keys that I remapped to F13 - F24) and, no matter how much Windows accepts that I DO have 24 F-keys, NWN does not recognize them.
The same goes for mice, I just got my Copperhead and I have four extra buttons to play with yet I had to create a make keyboard macro to get the job done.
Hopefully NWN 2 will have support for all of this.