integrating roundcube webmail

Hi all,
I want to eliminate the need of my web users to relogin to roundcube webmail.
I’ve seen this done with the modules for SMF and Gallery2.

I really want to do it, but don’t know where to start... anyone mind enlighten me where to start?

ok some reading to do.
http://modxcms.com/forums/index.php/topic,23176.0/topicseen.html