Holy %$@!!!! X5 locked up after DICE install

[Sablotny]

So, I did the DICE install this afternoon, thanks to the BSW instructions posted on this forum. I didn't quite pull the 20 minutes that their techs can do, but I was putting everything back together while my girlfriend checked out her new system at 1:15. Just as I was congratulating myself on a clean install, I tried starting up the truck. Headlights flashed rapidly, whacky lights flashed across the dash, and nothing else. The car's locked up in PARK, won't turn over, now out of juice. Seems to be a short circuit big time. I plugged in the 3 and 6 pin connectors to the DICE cable, and possibly did something really stupid- I mounted the DICE module to the carpet under the driver's side seat with two 1/2" wood screws. Are there some serious cables running under the driver's seat that I drove a screw into? I think I'm seriously hosed, since I can't even move the truck. Any info, advice or condolence welcome. First I gotta figure out how to get the thing into a shop. 2001 NAV, non-DSP.