Adding a field to Template Based Hire

I have added a field called Job ID to Template Based Hire through the Template Creation pages. The last thing to do is to get the prompt table to work correctly.

The prompt record uses Business Unit and DeptID as key fields. These fields are entered on the page prior to the Job ID field. I would like to limit the rows returned on the prompt to just those whose keys match these fields.

This is the first time I've work with Application Packages and I've been having a hard time setting this up. I tried using some of the existing PeopleCode under HRTMPL:FP as examples, but nothing I've tried has worked. If this was a standard page I would have no problem with this, but the Application Package looks like an entirely different beast.