What in the fuck? Scott maybe clean this thread up sometime.
In regards to unracking, set your bench heights to as low as they can go without you having to press the bar out too much. Depending on the type of bench you have you might have to make a compromise here but try to minimise shoulder activation and just use your tris if possible. As Von said fill your lungs with air and expand the chest, tense the lats, etc, like if you were about to start the press. Then try to pull the bar out of the racks rather than press. Use your tris if you need to make a little bit of a pressing movement but try not to let you shoulders activate too much as this usually leads to losing your setup on the bench.
So press up with tris then pull the bar over to the chest.