I would have played that level for you but I'm busy in Thief II right now. I'll point this golden link out to you though: *www.thegtaplace.com/downloads/file.php?id=1600.
That is a link to the GTA SA Crazy Trainer by Crazy Virus. After you download and install it, run it and click on info. Find out the combination to "Toggle Jetpack"(Should be Alt+K) AND the "Fly in direction of camera" control(Should be Alt+L) . Run the game from it. During that mission, as soon as you take off, press Alt+K. You'll become completely still in midair. Next press Alt+L and marvel as you fly forwards in the direction of camera. Get into the ring after you see the plane, then quickly hit Alt+K again during the cutscene to disable the cheat or the game will be stuck.
Happy Flying!!!
Mind you, I'm against using trainers but I know how worse can the situation get! I couldn't pass that lowrider dance once. I still recommend doing it on your own. The trainer won't help you out in the last mission.