RewriteEngine on
RewriteCond %{REQUEST_URI} !^/_wpez63/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /_wpez63/$1
RewriteCond %{HTTP_HOST} ^(www.)?occcustomsite10.com$ [NC]
RewriteRule ^(/)?$ _wpez63/index.php [L]
ErrorDocument 404 /_wpez63/index.php?error=404