ComboBox for display name

Hi,

here i opend a thread in the german support forum but still no solution for my problem.
Subscriber should not see the admin bar so i installed for that (and other reasons) User Role Editor. Subscriber should only edit his own profil in frontend so i use the [wpmem_profile] shortcode.
Everything is okay but how can user change there display name?
In the WP backend there is a combobox with
– [nickname]
– [first_name]
– [last_name]
– [first_name] [last_name]
– [last_name] [first_name]
and i know that i can create/add (custom) fields but when i select an own field type combobox (i don’t know the english word in WP backend) i must set values too. This values i can write by myself but are there any shortcodes for this values too?
I don’t want a text field with free input, only a combobox.

Regards, Thomas