Little .htaccess help

[Boogie]

thanks mate. does this look right?

RewriteCond %{HTTP_REFERER} ^http://(.*@)?([a-z0-9-]+\.)*http://www.ridgeviewelem/.org(:[0-9]+)?(/.*)?$ [NC,OR]
RewriteCond %{HTTP_REFERER} ^http://(.*@)?([a-z0-9-]+\.)*http://www.uccpp/.org(:[0-9]+)?(/.*)?$ [NC]
RewriteCond %{HTTP_REFERER} ^http://(.*@)?([a-z0-9-]+\.)*http://www.myspace/.com(:[0-9]+)?(/.*)?$ [NC]
RewriteCond %{HTTP_REFERER} ^http://(.*@)?([a-z0-9-]+\.)*http://www.xanga/.com(:[0-9]+)?(/.*)?$ [NC]
RewriteCond %{HTTP_REFERER} ^http://(.*@)?([a-z0-9-]+\.)*http://www.penny-arcade.com(:[0-9]+)?(/.*)?$ [NC]
RewriteRule .*\.(asf|mpg|mpeg|wmv|avi|rm|gif|jpeg|jpg|zip)$ - [F,L]