Cristián Lávaque wrote:You can create additional fields for profiles using s2Member's Custom Registration Fields.
WP Admin -> s2Member -> General Options -> Custom Registration Fields 
in this options see
Custom Registration Fields ( optional, for further customization )
Some fields are already built-in by default. The defaults are: *Username*, *Email*, *First Name*, *Last Name*.
Custom Fields will appear in your
Standard Registration Form:
don´t see option apply to profile
or this options :
Allow Profile Edits: * If No, this field will be un-editable after registration.
* Administrators are exempt from this.
tanks