Using a pre-existing subdirectory install

I’m hope someone knows the answer to this … I finished my site and copied the index.php and .htaccess files from the “wordpress subdirectory” to the root directory and I think I messed up so I need to know which file to fix.

Before I copied the files, I changed the Site address (URL): (in the general settings) to http://nwohiocc.com/ (like I’m supposed to per this http://codex.wordpress.org/Giving_WordPress_Its_Own_Directory)

but then I think I accidentally also removed “wordpress” from the WordPress address (URL): instead of leaving it like this: http://nwohiocc.com/wordpress … I made it this http://nwohiocc.com/ in both places (I think). … what file does that affect? Is it the .htaccess file?

I also edited the index.php (now in the root directory) to include this:
require(‘./wordpress/wp-blog-header.php’);

I can’t log back into the site now. And when I go to the URL the formatting is all messed up!

Thanks Shelley