Re: No extended profile
To add additional profile fields, you need to navigate to the BuddyPress submenu grouping in WPMU’s backend. If BuddyPress is installed and activated, this submenu group is found at the very bottom of the menu column.
So, go to
BuddyPress > Profile Field Setup
and set up the additional fields you want.
By default, when you activate BuddyPress, all of its components are activated. To selectively disable a component, you go to
BuddyPress > Component Setup