Did you have to replace the cars battery or maybe jump-start it ?

I have done both.

Did you remove the fuse in the alarms wireing harness when doing the
above?

No. The alarm controls a normally open starter interrupt so I can't start
the car with a dead alarm. In retrospect, I suppose I could've
temporarily patched the starter line. I did the interrupt myself, so I
know how, but it would've been a major pain in the ass.

What I was getting at was sometimes you get a spike when connecting the
cables.. You should have removed the fuse, connected the jumpers,
reinstalled the fuse then started it..? I know a pain in the ass but
sometimes thats all it takes to zap the circuts. The stuff you mentioned
with the door locks makes me believe the brain is at fault.

Yeah, when my alarm worked it had poor range. I hope that wasn't the
installer's fault. I put the antenna up high as possible inside the
windshield, just like the manual said.

I paid for a installer and was upset on his generic install.. I'll most
likely redo it myself. Make it harder to locate and such..
I had a Viper in the early 90's. Walk out of the mall and chirp chirp.
Didn't matter how far you parked.. But then again it was in a older car
without all the electronics of todays cars.

Anyway let me know what kinda feedback you get from CS..

F.D.