How to put table_name into the PK?

Hi, 

Under naming conventions, I can see PK are set to ${Pk_name}, but I want to set it to "PK_"${Tablename}. How do I do this? 

My goal is to change all PKs in the model away from "PK_PRIMARY" and to use tablenames of the each PK. We have 100's of tables so want to use the 'apply to all' button.

Thanks

Amit