Configuration Question

[Joey]

OK I have converted over to the latest version and have mosting things
running well.
I wanted to confirm how to properly use SURBL's
in the previous version I used a .cf file, however the docs say 3.0 and
higher come with SURBL support. 
is the URIDNSBL the same thing which you activate from init.pre?
loadplugin Mail::SpamAssassin::Plugin::URIDNSBL
 
If not how do I activate them, and control which ones to use or not to?
 
Thanks!