Business Partner Bapi with additional fields

Hello Friends,

I have made a program which uses the following BAPI's:

BAPI_BUPA_CREATE_FROM_DATA

BAPI_BUPA_ROLE_ADD_2

BAPI_IDENTIFICATION_ADD

BAPI_BUPA_ADDRESS_CHANGE

These works fine but when creating and changin a BP, i need to update an included structure in table BUT000. Any idea if there is a BAPI that does this? Or how to do this?

Best regards B