It is possible to get on the roof of the center building (also the one with a garage - it has a car in it) in Backlot. Go to the second floor and go up to the wind facing away from where 'Flag B' would be if you were play Domination. Get it to saw "A to |-> (where you can like go on top" So now you should be standing in the window sill. While crouching slowly walk out and look toward the left. You will see a balcony. Jump and hit A twice so you can again activate the "A to |->" while in midair. You will be in the balcony and there will be a ladder leading to the roof. Climb up and you can see practically the whole map. However, there is minimal cover so don't stand straight up, try going prone and after getting some kills go to the middle of the roof and regroup.
