I use a leaf blower that I bought at Wal-mart for about $100. I just stand the super up vertically on it's front and blow the bees out from the top in front of the hive that I removed the super from. The bees have never stung me while doing this as they simply relate the air coming out of the leaf blower as a super strong wind.
I recommend a leaf blower that produces at least a 200 mph blast.