Protecting Forum Images from Hot linking

[JesterP]

Looking for similar help, I used the examples given here and am unable to prevent hotlinking to albums on my site. The url contains picture.php, not jpg|gif|png.

http://www.myforum.com/forums/picture.php?albumid=88&pictureid=9526

# stop hotlinking and serve alternate content
RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?myforum.com [NC]
RewriteRule .(jpg|jpeg|png|gif)$ http://www.myforum.com/images/hotlink.jpe [R,NC]

That code works, but need to include picture.php in there and I cannot seem to get it to work.

Thank you