OK, I looked around and found some other files assoc w/FF, and deleted them, an reinstalled 2.0.
and this time, it started as if FF has never been on my PC. Just the way I wanted-totally default 2.0. I have saved the bookmarks from ff 1.5, but I'm afraid even to import them due to the possibility that whatever was freezing up ff 1.5 is in the bookmarks...I'll have to create the profile I had too...(themes. extensions, etc), but I don't mind as long FF 2.0 doesn't freeze up everything..I'll have to use it a coupla times and see...and if all is OK, I will create my old profile, tweak, customize, etc/
Thanks, guys.