AuthUserFile /dev/null
AuthGroupFile /dev/null
RewriteEngine On
RewriteCond %{HTTP_REFERER} !^
http://yourdomain.com/ [NC]
RewriteCond %{HTTP_REFERER} !^
http://www.yourdomain.com/ [NC]
RewriteRule /*
http://www.redirect.com/ [R,L]
Or something...
try hotlinking from an open directory....less worries