I'm new to WP but have had websites for a long time.
I manually/ successfully installed WP/ZendOpt to the root dir in some of my existing websites (1AND1.COM). It worked. This created a problem with an index.htm and index.php in the root dir. So I created a blog.URL subdomain and moved all of the files to a new "blog" folder that I created in the root dir. It all seems to work but the URL/blog/wp-login.php login page doesn't work and recycles to URL/wp-login.php. for a re-login in the root dir..
Question: Can I change the code to direct the URL/blog/wp-login.php direct to the new "blog" folder where the wp-admin files are located. I could delete and start over but I have content in other URLs with the same problem.