I found that using the spanner tool worked fine IF I took weight off of the rear tire. Although I have a motorcycle jack, I used just a regular car floor jack.
I placed the jack on the left side as you sit on the bike. I put it just in front of the rear tire on the frame. This caused the bike to a) lift towards the right which actually stood the bike up and centered it, and b) lifted the weight just enough off of the rear wheel to allow me to turn the shocks easier.
Hope this helps someone
Ghost
Or, for a quick fix, have a friend lift up on the rear. You're right, that by taking off the weight adjusting the shock is easier.
--jj_WA--