How to subscribe a user to a group after completing the checkout process?
I´ve tried this: http://drupal.org/node/1416742#comment-6124082 and didn´t worked out.
Is there a way to set manually a group using the group NID?
Like after Completing the checkout process
and Order contains a particular product
Create a new [user] entity ...
Loop: Add user role ...
Until there I get the rule working smoothly.
I would like to add to it: Add user to group where NID of the group is: X (an arbitrary node number, which is a group nodetype)
Maybe this could be done with some php? How?