Adjusting a Kimber rifle trigger is really no different from any other bolt gun, as long as the identity of each screw is known.
As you have identified the sear engagement screw, the overtravel screw and the weight of pull screw, the drill is:
* Cock the empty rifle action
* Safety off
* Screw in the overtravel
screw until it gets snug. Try to 'fire' the rifle. Keep unscrewing it until the trigger just releases, then back it off further 1/4 turn for safety.
* Once determined to be safe with the 'stock bump' on the floor and the bolt slam drill to ensure no AD possible, you can adjust the weight of pull screw to your desired pull weight and have a safe rifle.
* Adjusting the sear engagement is not a good idea, it's adjusted at the factory for safety. If you feel it really needs tweaking, let a competent smith do it for you, but doing so may/will negate your factory warranty.
IMHO, a hunting rifle trigger should not be adjusted to less than 3 lbs. It's your choice, but as a precision shooter and life-long hunter, my bench/varmint rifles wear 10 oz. triggers, but my deer/antelope rifles are all set at 3 lbs. My elk rifle is 4 lbs because I'm usually wearing gloves.
Let us know how it goes, should not be too much of an issue.