i did that on my s14...
but my old s14 (totaled and bought back from insurance) had power locks and the new one didn't.
So I pretty much ripped all the power lock parts out of the donor car and sat there and tested wires with a battery till the system worked. Then I installed it in the new car.
http://www.dapcwiz.com/misc/locks.avi
video I took when I got it working. It kinda shows you all the parts you need to do the swap if you wanna do oem....
also I didn't put a power lock switch on the passenger side, lol. Didn't want to give my passenger the power
I also ended up using the power door lock wiring harness from the power door on the driver's side, and running my own wires on the passenger side.