I formally give up.
I am not going to waste any more time trying to upgrade to Gnome 2.6, either through Garnome or otherwise. I have spent more than a week trying out all sorts of things, but it simply refuses to run. There are no messages in /var/log/user.log to report to the gurus.
Anyway, I am pretty satisfied with Gnome 1.4. It does everything I want. No point in trying to keep upgrading to the New and Improved (tm) version just for the heck of it. I am not a Windows groupie, right?
I am also waiting for my Fedora CDs. Let's see if my karma dictates that I will earn the privilege of seeing 2.6 when I get them.