I stumbled across this thread and looked at the product at TheCarPCStore site, and it sounds like this could be the answer to my problem. I don't think I can solder wires to my power switch, but my PC has a bios setting that will boot whenever power is applied. If this software +cable will shut it down correctly, I'm done. However, I have a Carnetix 2140 power supply, which is different from the ones on the web site. Can this shutdown controller work with this power supply? The carnetix has two wires that are supposed to be soldered to the power button to simulate a momentary switch. If I connect these wires to the two leads on the end of the serial cable, will this work? I would really appreciate any advice on this one.