My host only lets me make subdomains via htaccess, not thru DNS or a normal method. Is this an issue with SE's at all? The htaccess lines would look like this: RewriteCond %{HTTP_HOST} subdomain.mydomain.com RewriteCond %{REQUEST_URI} !folder/ RewriteRule ^(.*)$ folder/$1 [L]
They have to use dns. This is the only way to set up a subdomain. It sounds like they're using wildcard dns which is actually easier for you - all you need is the htaccess. The dns is automatically setup on their side when your account is setup. It won't bother search engines at all.