Best way with Different Dsq files.. help

Hello,

Basically, I want my character's lower body to be controlled with the keyboard (way you're moving), and the characters upper body (way you're looking) to be controlled with the mouse (Know what I mean?). But of course you shouldn't be able to twist the upper body all the way one direction and the lower body all the way the other.... So would the best way to accomplish this be to make a seperate dsq file for the upper body twisting and one for the legs facing different ways? OR would only having the dsq for the upper body and just changing the way the legs are facing with programing or something be better? (I know little about programing) Or...is there a better way... please let me know!

THanks

~Jason~