How to hook into Add New Member in BuddyPress

I have a hook into the WordPress Add New User process via an add_action('user_register', 'doMyFunction'); hook.

What results is that I am (Step 1) adding a new user through WordPress and then (Step 2) having to add the same user to BuddyPress in order to get the user fully activated in WP/BP with the proper role.

I would prefer to just add a new user/member once through the Buddy Press Add User page and have it go through my hooked function.

Is there a Buddypress hook I should change too on the hook I show above in order to eliminate the 1st step described in my process?

Thanks for helping.