This mod is pretty straight forward.. 

Requirements: 

1. Sjaak's Simple Native Trainer (or any trainer that can load .ini files)

Install:

1. Take the objects.ini file, and place it in your install directory of 
GTA IV, TBOGT, or TLAD. If you already have an objects.ini file in there 
just rename it objects(1-10).ini

Note that some of the ramps aren't perfectly flush with one another. I re-did
it 3 times, making the loop smooth.. But every time I'd save & load the park
something with the trainer would throw them off.. 

So I finally said screw it, but you can see in the video it still works great. 

Enjoy.