To qualify myself despite the unusual e-mail address, I was a mechanic at a large city transit shop and had to work on alot of Gilligs, Neoplans and Flexible busses. The Thermoking Unit should come out okay, the fire wire should be left in or remove that section completely. I may have some wiring diagrams left around somewhere that depict the relay boards on the bus. Unplugging the A/C relays and fuses should stop any alarms from annoying you. I would recommend removing all the blower motor wiring as far back to the batteries as you can to prevent future shorts. As for a replacement a/c system, I would contact a local Kenworth dealership and ask for the NITE system salesman. (Unless you want gensets on your unit) I just recieved a projected EPA no idle zone map of the U.S. and it looks like East Coast, West Coast (surprise), and everything south of I-80 is going to be restricted to a 5 minute idle law (including gensets, pony motors, main power engines, reefer units etc). The NITE system comes with Heater, A/C, and block heater options and I was told that it would keep the cab of a tractor at 70 F with ambient temps of -10 F. Anyway, just a thought. Also, custom installation per application. No I am not a salesman, just a mechanic.