[exim] exiscan configuring?

Can anyone tell me how to configure the exiscan addon?

I looked around but couldn't find much on it - or I looked in the wrong places.
I'd like the server to NOT email senders of viruses telling them that their message was rejected. But I would like a message sent to the recipient stating why the message was rejected. So they can contact the sender if needed.

I was previously using MailScanner + ClamAV - but as it's not supported by cPanel, I'd like to switch over to exiscan.

Thanks!
Eric