Am I doing hotlinking protection right?

I've enable hotlinking protection from CPanel, but I just want to check and see if I'm doing it right using the .htaccess file in the root of my domain.

RewriteEngine on
RewriteCond %{HTTP_HOST} !^www\.mysite\.net
RewriteRule ^(.*)$ http://www.mysite.net/$1 [QSA,R=301,L]
RewriteCond %{REQUEST_FILENAME} .*jpg$|.*gif$|.*png$ [NC]
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http://seconddomain.com/.*$      [NC]
RewriteCond %{HTTP_REFERER} !^http://seconddomain.com$      [NC]
RewriteCond %{HTTP_REFERER} !^http://thirddomain.net/.*$      [NC]
RewriteCond %{HTTP_REFERER} !^http://thirddomain.net$      [NC]
RewriteCond %{HTTP_REFERER} !^http://images.google.com/.*$      [NC]
RewriteCond %{HTTP_REFERER} !^http://images.google.com$      [NC]
RewriteCond %{HTTP_REFERER} !^http://www.images.google.com/.*$      [NC]
RewriteCond %{HTTP_REFERER} !^http://www.images.google.com$      [NC]
RewriteCond %{HTTP_REFERER} !^http://images.search.yahoo.com/.*$      [NC]
RewriteCond %{HTTP_REFERER} !^http://images.search.yahoo.com$      [NC]
RewriteCond %{HTTP_REFERER} !^http://www.images.search.yahoo.com/.*$      [NC]
RewriteCond %{HTTP_REFERER} !^http://www.images.search.yahoo.com$      [NC]
RewriteCond %{HTTP_REFERER} !^http://www.msn.com/.*$      [NC]
RewriteCond %{HTTP_REFERER} !^http://www.msn.com$      [NC]
RewriteCond %{HTTP_REFERER} !^http://msn.com/.*$      [NC]
RewriteCond %{HTTP_REFERER} !^http://msn.com$      [NC]
RewriteRule .*\.(jpg|jpeg)$ http://www.mysite.net/hotlink.jpg [R,NC]

Code (markup):

The seconddomain and thirddomain are friendly sites I want to allow linking from. I also want to allow Google, MSN etc. The hotlink.jpg should be displayed if someone is hotlinking to a file. Will this work, or did I mess up somewhere?

 

Anyone that can help me out here?

 

Yes ofcourse this will work. And you could have done easity using hotlink protection section in cpanel. right?