I found something that makes freewheel removal really easy - one of these:
http://www.nashbar.com/webapp/wcs/st...1_11501__11501
plus a freewheel tool
plus a staircase.
I stand at the bottom of the stairs. The wrench holds the freewheel tool securely so I can put the wrench and tool together into the freewheel. I then put the handle of the wrench on the bottom step, facing down and to the left. The wheel is between me and the wrench. I then push down on the wheel. I have not found one yet that doesn't come off like butter. And no wrench handle bruises or leverage bars. just make sure the tire is mounted and reasonably inflated - and the previous suggestion about putting the QR or wheel bolt on (not too tightly) is essential!