2000 KN LASER GLXi 1.8l won't start and no-one can help

[rockyfestiva]

My wifes 1999 Laser just recovered from a similar problem. Immobiliser was faulty. 2 mechanics and 3 auto electricians couldn't fix it. Told me even f they got the parts, no one could reprogram the system. In despair I bought an ECU, immobiliser, ignition switch all from the same car with keys at the wreckers for $185. Installed the replacement parts and car started first time and has not stopped since. This is after spending 2k on towing, crank and cam position sensors, sending ecu and bits away.. even the local dealer wouldn't look at it.