Don't have the gun in front of me right now, but if I remember correctly there is an itty-bitty allen screw right in front of the trigger. If I recall this screw adjusts the amount of travel on the sear, or how far the trigger moves before letting the sear go. Be careful not to try and get it to "light". One way to test it is to set it where you like the pull, then cock the gun (pointing in a safe direction even though you KNOW its unloaded) and give the butt of the grip a few good thumps with the heal of your hand. If the hammer falls, back off on the screw until it won't let the hammer fall when you thump it.
You can get most of the "creep" out of the trigger this way, but to actually get a lighter weight pull you will need to take it to a gunsmith and have a trigger job done on it.
