I didn't see this thread. I have been posting on the WHAT IS A GOOD ALARM thread. Circuit City normally will pay for it. Something to note: The alarm had worked normally from January until now without any problems? Thats almost a year. Usually if the install was bad you would have had intermittant problems. Also, I don't remember ever seeing an alarm with burned wires. The only wire on the alarm that could cause it not to start would be the cut starter wire and unless it has a bad connection, it is usally wired in a normally closed configuration meaning that it will only open the connection when the alarm is going off. if there is a problem with the alarm the connection stays closed.
I would hate for you to have to pay for a starter relay wire to be loose, such an easy fix for the amount of money they will charge you.