I was shown a new way to get on the roof with all the antenas on Crash facing the "B" flaf. The roof of the cafe. This can be done in any gametype, not just on Old School.
Get on the roof with the AC unit and all the sandbags facing towards the three story building back by the "C" flag.
Go to the upper left corner of the roof looking towards were the "B" flag would be. There is a lamp post directly in front of you. Jump to it. Stay in the back end of the post and look to your left.
There is some AC ducting going up the side of the building to the roof with all the anntenas on it. Move back enough so you can sprint jump to the ducting and hit the jump button as you hit it and you should pull yourself right up.
I can do it almost everytime now. Just make sure that when you are on the lamp post that you back up a bit until you almost fall off. You need the speed to help you jump higher. The best time to do it is when you are playing Domination and the other team will be busy trying to get the "A" and "B" flag to notice you.
When you are laying flat on the roof, no one can really see you because you are so high up. And you will have a commanding view of "B" to snipe the crap out of everyone. Using UAV Jammer is actually useful when using a Sniper Rifle here, as you are so close, you will usuaully get a kill with just one shot. Or if you use a Silenced AR and UAV Jammer, you will be a god up there. Just be careful to look out for the guys in the "Blue Room" windows looking out over the "B" flag. They have a bit better view than most.
Just my 2 cent for that new little slice oh hell. And yes, I am a camper when appropriate, so suck it. I'm here to win.