AdreNaLiNe
Veteran XX
I ran it yesterday but haven't looked at the results yet. How long it takes is dependent on your gear (assuming you don't change the setup parameters). Took ~3 hours for mine (on an i7-950 @ 3.7 GHz) since there were ~2.2 billion possible combinations.
Easiest way to test the results is to load up your current setup in http://shadowcraft-test.appspot.com/ check the DPS, then try the setup from the tool.
Did you run the multi-threaded app? It significantly reduced the amount of time for me. I'm running an i7 950 as well. It dropped from about 120 minutes to 50 minutes.