Some info:
1) IAC of 10-50 WARM and in DRIVE at idle is okay.
2) The more that the throttle blade is closed will RAISE the IAC number. Basically you are getting more air bypassed when its more closed so the IAC counts will be higher. If you really want to lower the number you will need to turn the screw in tighter which will lower the number and decrease the counts. It works opposite of conventional thinking.
After each SMALL adjustment be sure to restart the car so the change takes effect.
Set your TPS a little lower like around .40-.44v at most. Otherwise the ECM thinks you have your foot on the gas or are off idle.