Oh man, this is more complex than I thought.
The pages it will go to are Drupal blog pages...I think they're in php. Just regular blog pages.
And I tried to add that where my host allows me to set up subdomain forwarding. They just ask for the subdomain name, so I put an asterisk there, and then they want the subdirectory/URL that it points to, so I wrote /*
So then this needs to be done with Apache?