I put the 2.5 files where they were in the previous version and deleted everything that WP told me to in the upgrade instructions. I've looked at the folders/files in FTP and they all look ok to me, but I'm not sure I'd notice unless something was way off.
I did try what WP is asking and got an e-mail back that said this:
Your new WordPress blog has been successfully set up at:
You can log in to the administrator account with the following information:
Password: User already exists. Password inherited.
We hope you enjoy your new blog. Thanks!
--The WordPress Team
But nothing changed - I still get the install screen whenever I try to go to http://www.momof3girls.net or any page on the site...
Thank you for your help! I will see if I can get to phpmyadmin and will check FTP again.