I haven't read all the posts, but I'll through this out there.....

Since it's not a GPS approach or even a GPS overlay on the VOR, you're not
flying to or sequencing to the waypoints on this VOR approach, you're flying
away from MHT, so that's what you need to measure useing DME or GPS.
I'd go Direct TO MHT, or make MHT the active waypoint, put the GPS in OBS
mode... tune in the 210 bearing from MHT into the GPS or your OBS so it drew
my outbound course and it would also measure my distance from MHT along that
course.... then I'd fly the VOR needle because it's a VOR approach and use
the GPS from MHT for dme.
Jim