How to get "Secondary Usergroup" to also make it be the "Default Shown"?

Hey all, just a question. We use secondary groups for our extras. However as you know, only the primary usergroup could auto default to the assigned primary group.

I wanna know, how can I code it in, so that when a user gets a secondary usergroup, that it will also alter in the database the "Shown usergroup" to match that new secondary group? This way my users dont have to do it manually in the usercp - group settings.

We did this for our paid subscriptions one time, but thats a seperate file all together.

Thanks. =)

[BobbyBig]

yes i need that too, please help!