I tried enabling SDAutoconfig in my 6.1 rom, but it flat out doesn't work.
When you select a Carrier, it disables autorun. So I modified the registry to set:
[HKEY_LOCAL_MACHINE\Comm]
"AutoRunFlag"=dword:00000000
After which, it complains about not being able to find autorun.exe so I copied that into /windows (as described at
http://forum.xda-developers.com/showthread.php?t=366333).
I'm still working on getting it working right...