Engine quit, Car has 3/4's fuel, guage reads.

Hi,
I'm back from the Dark Continent, and I don't remember where we left off, but here is where we are at this point. I bought an code reader, it didn't work, just sent it back. A new developement is the car will not go into neutral, acts like it had an anti theft thing gong on. Seems the more I've done to it, the worse it gets. Probably should have changed the crank position sensor before doing any of the module changes. To refresh your memory, I've changed the BCM, and the fuse box. That didn't help, so I have the original parts back in. Any idea what I can try next? I bought a Crankshaft position indicator but it seems to be the wrong one, unless I am looking at the wrong component it is a different connector. The cpi is in the front of the engine, right above the starter, right?
I've never had such a hard time fixing a car problem, I am at a loss.
Gr

Yes, no spark, no fuel pump action when key is turned on. The pump works when I jump it at the relay, also have fuel pressure at the bleeder valve. The reader was supposed to "live read", but it was inop when I received it.

The symptoms have multiplied since I've begun working on it. I tried to move the car out of the garage, but couldn't even get it to shift from park to neutral, maybe a computer problem?

What is the sensor above the starter? I was mistaking that for the CPS, should have realized it since it has only one wire and the CPS has two. Duh. I have a new CPS and will install it, although with all the other symptoms I doubt that it will do much good.

Back again. I kind of gave up on this because I wasn't getting anywhere. Since then the car has been to two different shops, the first said they couldn't communicate with the BCM. The second shop pulled the CPS because it was bad. They think that the sensor was the original problem and I must have crashed the BCM when I changed it, maybe because of a static discharge. They told me that I would have to bring it to a Saturn dealer to have it flashed or reprogramed. (If it isn't damaged) So I had it towed today and the dealer will have a look tomorrow. Will let you know what happens. I've got my fingers crossed.

I said in my last post that two shops were unable to communicate (talk) with the BCM. I'm hoping to get it figured out at the Saturn dealer. Will let you know.
Gr