Ok, for 1 you don't have to touch the booster to drop the motor and trans, and..
Lay on your back under the steering wheel and disconnect the brake light switch and slide the push rod loose from the brake pedal, remove the 4 nuts around the push rod on the fire wall, divorce master cylinder from booster, you can take the lines off, you probably need to bleed the brakes anyway if you haven't done it in the last year/20k , remove wiper cowl and wiper stuffs and remove booster
when you install the new one, make sure you don't twist that push rod, it's a factory pre-set setting, changing it can greatly effect your brakes in a bad way