On one of my sites, I have an anti-hotlinking .htaccess, and to allow certain sites to hotlink, I use this:

RewriteEngine On
RewriteOptions inherit
RewriteCond %{HTTP_REFERER} !^IPADDRESS/.*$ [NC]
RewriteCond %{HTTP_REFERER} !^http://www.whateversite.com/.*$ [NC]

You may need only the last line, or you may need the whole thing, but give it a whack, as it certainly can't hurt.
.htaccess is one of the most mysterious things I've ever used. So many cryptic functions. :mrgreen: