Setting Priority List for Personnel Action Types

Does anyone know how to populate the table V_529A_B that is used to maintain the priority list for Personnel Actions?

I have activated the Additional Actions functionality, but I have not found out how to create an entry in the Priority List for Personnel Action Types table (V_529A_B). It appears that a feature or something is run to populate the table when I execute the transaction, but only one entry appears in the table. I can't find the feature and I don't know the criteria that is being used to select entries for the table.

I have several Personnel Actions without U0000 selected that have U0302 selected, but they don't appear in the list when I execute the Priority List for Personnel Action Types transaction within the "set up personnel actions" menu item of the IMG.

Any help that is provided will be greatly appreciated.

Thanks,

Keith