Try your local LBS(s), esp the older shops, and see if they have either the Bicycle Research CT-3 or VAR Normandy freewheel remover tool and/or have them take it off. Paying the few dollars for removal will save you time and possible self-inflicted injuries.

Can do a search to find how to destruction removal of the freewheel or read Sheldon's article:
http://www.sheldonbrown.com/freewheels.html#disassembly