Recurring Problem with 3.6, core files in subfolder, site url at root

@bemdesign:

This looks wonderful, but how will this affect a sub-directory multi-site setup? My story: I have a static html site on the root of my host (radiant-homes.com) which when typed calls index.htm and loads.

I recently wanted to try out WP and setup a blog in a sub-directory (radiant-homes.com/blog/) and all is well. I fell in love with WP so much, I decided to setup multi-site and re-create my original static page into WordPress format. (ugh…. what a learning exp but I got it!) The “new” (main) re-creation site is @ radiant-homes.com/blog/wp/ and everything works so far!

Now, I want to DEL the old html site and have radiant-homes.com load the WP site located @ radiant-homes.com/blog/wp/ I think this would be easier if I didn’t have multisite and quite frankly, I’m scared! I put in umpteen hours building my WP static site from scratch! LOL

Thanks in advance….
Jim
PS: My multisite wp-config.php entry

/* Multisite */
define( ‘WP_ALLOW_MULTISITE’, true );
define(‘MULTISITE’, true);
define(‘SUBDOMAIN_INSTALL’, false);
define(‘DOMAIN_CURRENT_SITE’, ‘radiant-homes.com’);
define(‘PATH_CURRENT_SITE’, ‘/blog/’);
define(‘SITE_ID_CURRENT_SITE’, 1);
define(‘BLOG_ID_CURRENT_SITE’, 1);
————————————————————–
PSS: my multi-site .htaccess file

RewriteEngine On
RewriteBase /blog/
RewriteRule ^index\.php$ – [L]

# add a trailing slash to /wp-admin
RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ – [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(wp-(content|admin|includes).*) $2 [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(.*\.php)$ $2 [L]
RewriteRule . index.php [L]

# BEGIN WordPress
# <IfModule mod_rewrite.c>
# RewriteEngine On
# RewriteBase /blog/
# RewriteRule ^index\.php$ – [L]
# RewriteCond %{REQUEST_FILENAME} !-f
# RewriteCond %{REQUEST_FILENAME} !-d
# RewriteRule . /blog/index.php [L]
# </IfModule>
# END WordPress