How do you do hotlink protection for sub.domain wildcards?

[WebHostPro]

Hello,

Thnaks for any help.

I have a subdomain wild card set up for a domain: http://www.webhostingpal.com

Here is a example:

http://test.webhostingpal.com

I would like to have any sub.domains have hotlink protection without putting a htaccess file in each diectory.

Maybe a apache config or server wide method.