I'm not sure i follow.
the DataAssist search wizard uses the recordset that you create as a base.
Before using the Data Assist search wizard, you should create the results page.
create the recordset that will be used by the results page without any filtering, and create the results layout, then run the security assist wizard. The wizard will create the search form for you and add code to the result page to filter the recordset based on what is entered in the search form.
the recordset you start with can be a join query or a standard one table query.