i am at the level where you gotta destroy the car anbd do stuff with sleepy ernest and bend the antenna and i cant do al the antennas in time are their any suggestions

i dont think theres really anything u could do all i did was use my jetpacks and hop from one building to the other and i dont see any other way to do it except walk from one to other

Tank's right - just get to one of the buildings with an antenna on top and jump on top of it. Use L1 and click on the O button or watever it is and then just strafe left and right to avoid any bullets firing at ya. Once you've done that antenna try and go in a circle around all the antenna so that its faster and jsut do the same.
A little tip I found is that if your jetpack runs out of energy but you dont wanna come down yet just keep on tapping the X button really fast and all the landing power will keep you up.
I wouldn't suggest using that on this mission though. Just use a little bit until you reach the top of another building but try and get as far as you can. Once you land on the building just run to the edge of the way youre going and get your ketpack out once again.

thanks guys i tried that after posting and before you responded and it worked but thanks anywAY

No problem - glad to be of help.