I've been looking at a few different ways to convert the CRV
and one idea is to re-install one of the half shafts with a brace, a bearing and a pulley that could be driven by another pulley on a motor mounted to the floorboard between the fuel tank and storage hole. (above the bearing and pulley from the half-shaft).
Maybe a little motor like this one,
Battery Powered Systems
Putting a few HP into
one of the rear wheels..
Since I don't have any fancy anti-lock brakes, I don't see a lot of problems with only driving one rear wheel.. (right now)..