Not sure if you will be so lucky but I have been allways able to just undo the top nut on the shocker and simply pull the rear springs out without a spring compressor going near them and have both out and new ones in, in about 15 minutes. Both my VN and VH came out like that without any real struggle. I might have pulled the bolt out of the arm on the VN, but I definatly didn't on the VH and don't think I really needed to on the VN. See Georgeoboost has allready suggested this, he's right shocker undon and that's all you need to do
Like everyone has already said jack it up enough to take your wheel off, undo the shocker nut and bolt, get someone to put there foot on the studs and push down slightly as you pull the springs out... It's easy as.