What they all said. /ubbthreads/images/graemlins/smile.gif
If this is a new iac unit just bolt it in, reset the shitarree as per the v-faq, and you're good to go. Take your time, do it right, and the results are very satisfying. A logger really speeds up the proccess, and allows you to verify the iac command and control and the iac operation itself are up to spec.
For a quick post repair operational check, after you're done, give the steering a small turn, and watch for a ~10 count increase in the iac count, and watch for an idle rpm sag.
If this is a used iac you're installing, you must check the coil resistances before allowing the used iac within 10 feet of your car!
Failure to do so may result in a fragged ecu/collaterall damage if one of the coils is shorted.