This add-on stunt zone hardly interfere roads, walkway etc.. installing only change the view. Ascend up through a road heading up with 1 sparrow loop- easy to ascend as most car can climb up the slope.Find a fast car like default cheetah and upgrade it with nitro, then climb up and you may hang around the land there, then descend at amazing speed "terminal velocity" lol =P through the slide , lift off and glide through the city at a super high jump! You will gain amazing stunt results!
I made the slide like a tunnel at the start so your car won't flip off , drop off, etc.. .So don't find cars that is too tall or it might not go through. Cars like cheetah should work.
Car in screen shot/recommended car for the map (Ferrari FXX): http://www.gtagaming.com/downloads/?p=file&id=1589
Your map works fine but there are some bugs which you should fix:
I cant get out of my safe houses and appear in ammunation instead whenever i exited from the door/entered the wardrobe.
I had to kill CJ and make him respawn at the hospital or start a new game to get out.
My game works fine but i have one big issue... the jump has a tunnel at the start and i cant fit anything down the gap! i have tried bikes cars anything but none fit is there anything you can do ? cheers