Taking half the dashboard apart to get to the Parrot serial port: 1/2 hour.
Flashing the ROM on the Parrot: 5 minutes.
Putting everything back inside the dashboard: 1/2 hour.
A working Parrot car kit and Windows Mobile 6.1: priceless!
HUGE thanks to Just Car Kits in Slough for answering my questions and supplying the cable promptly. 10/10 for service.