Serious Car Troubles!? Help?

I have a 1990 camaro rs. 3.1L V6 i bought it as a project car for a school project. When i got it, it ran very good. But a few days after it stopped working, the key would turn over but not a sound from the engine compartment. So i changed the ignition with the correct VATS key. and nothing. Then i added a new battery. Still nothing. Not even a click. So i check the fuses under the dash and only a few are "hot" or live and most aren't. So i tried jumping power from one fuse to any other and that would work. So i tried starting the car like that but all there was, was a loud click. Chevy says that they cannot fix this problem. I personally believe it is a wiring problem but i REALLY REALLY REALLY need help asap.

Suggestion:

Sounds like what you actually changed was the ignition lock cylinder, not the actual ignition switch, there is a difference. Not being THAT much up on the later generation Camaros, (mine is a '79) Most of the newer cars have a fuse block under the hood, There are fuses that control the start circuit, check those. If that doesn't do it, I would think a bad solenoid, but if you get the car to start by jumping over fuses under the dash (which honestly puzzles me) then that would rule out the solenoid. I don't believe they had fusible links on the starter wiring harness, I think they did away with those in the 3rd gen Camaros when they went to the under hood fuse block. The actual ignition switch is mounted on top of the steering column under the dash near the brake pedal, and is somewhat of a nuiscance to get to. All the key/lock cylinder does is push a steel rod down through the steering column and slide a plunger inside the actual ignition switch. Relatively cheap, probably less than $30, and may take about an hour to replace.