How to modify an htaccess ...
 

... to allow one specific domain to be able to hotlink pics from my domain that's protected by the htaccess?

:helpme

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