Linux Mint 11 Rulez....
Mid can probably come up with some connectors for you.I'd be happy to solder them up for you and help you with the horns and lights.One thing to check on the parklight coming on when the brake is applied is you bulb usage out back.Classic symptom of a single filament bulb in a dual filament socket or vice versa. It could also be a flasher.The horns could be bad or need to be adjusted. The first thing to do is see if there is power at the horn when you push the button.