Modifying screen timeout during call

[blazinazn]

I'm running stock sprint ROM. Was wondering if there was a way to modify/change/tweak how long it takes for the screen to shut off during a call?

I would like to shut off after if I'm on a caller longer than 3-4 minutes. Right now it seems to turn off after a short period of time and I need to hit the power button to turn the screen back on so I can use the keypad.