Hold gun in hand, screw in filled up air bottle, make sure barrel is screwed on, dont look down barrel with gun on, attach hopper, if hopper has pretty buttons, turn on hoper, put paint in, point at target, pull trigger???? If no firee, turn on gun, with fresh batts and whatnot!
Seriously tho, after i sobered up slightly more, maybe one of the planet worshippers will tell you how to ramp a gun, and not run a gun!