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Um, bump?
Does anyone have any insight into this, or at least some approximation that will let me do what I need to do with some elbow grease?
Essentially, I want users to be able to join and leave some subset of XOOPS groups on their own (for example, allowing users to join and leave "Buy and Sell" but not allow join and leave "Registered Users"), rather than me having to add/remove them manually. This will allow me to set up messaging forms that emails specific groups, and have users opt in or opt out of receiving those messages.
Thanks.