Good solution for protecting image files in folder

[eluser]slowgary[/eluser]
Found this site by googling: http://altlab.com/htaccess_tutorial.html

They've got the following htaccess that gives hotlinkers an alternate image...

Code:

RewriteEngine On
RewriteCond %{HTTP_REFERER} !^http://(.+\.)?mysite\.com/ [NC]
RewriteCond %{HTTP_REFERER} !^$
RewriteRule .*\.(jpe?g|gif|bmp|png)$ /images/nohotlink.jpe [L]

Don't know about that 'jpe' extension though.