just leave all that reverse stuff unhooked and it bypasses everything al.
just had to do this on the mtn last week, my m8 stock diamond drive took a dump on the first day last week, jeff overnighted me a 09 (without mechanical reverse) to me and i slapped that in and bypassed all the 07-08 reverse stuff just like the setup you have. works fine, prolly end up going to the bdx setup and shaving a few more lbs in the process.
on a side note, the 09 diamond drive is 6-8lbs lighter (hand scale, guessing) then the 07-08 diamond drive, but still not as light as the 05-06.