Try this procedure from CEG, kind of buried in the how to's:
http://www.contour.org/mods/mods.php?s=howto&displayid=19
The programming plug should be accessible without disassembling anything, it is white and hangs behind the glovebox, near the kick panel. Brapple's post here http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=trouble&Number=724569&fpart=&PHPSESSID=
shows what the plug looks like, it's the one on the left in the photo.