Yes, idea #1 was it exactly -- I installed a new Wordpress, but used the existing database (which shouldn't have had anything in it, as I never actually posted using Wordpress).
However, your tutorial doesn't really help me yet. I downloaded phpMyAdmin and loaded it up to my site via FTP, but can't get it to connect to the database. When I try to connect using phpMyAdmin, I receive the following message:
"#2002 - Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)"
As you can tell, I don't have a lot of experience with PHP yet. I'm good with CSS, XHTML, etc., and I wanted to get into blogging, so the "one-click install" seemed like the perfect scenario for me. Now if only I could get it to work...