According to my service CD, it takes a special socket to remove/install bearing nuts.
Ford Axle Locknut Socket #205-448
It looks like an older style front hub socket with 4 lugs on the end to engage the nut, but has a tubular pilot in the center (for alignment?).
Maybe you can find one at a rental place.
The CD also talks about the nut coming apart (it's a 2-piece ratcheting affair) during disassembly or reassembly, so apparently it's kind of fragile. It might pay to have new ones (LH and RH threads, of course /ubbthreads/images/graemlins/rolleyes.gif) on hand before tearing into it, just in case.
Maybe one of the techs who frequent the forum can help out more.