ISSUE SUMMARY:
how do i change layout and text on the emails sent out from jomsocial? like the "thanx for registering" and so on?

Hi Daniel,

For any text changing, you can modify this file /language/en-GB/en-GB.com_community.ini

thank you!

and for the "design" of the emails?

modify this file components/com_community/templates/jomsocial/layouts/email.html.php