Hey Keith.When you imported the structure of the StrataFrameSample tables into your DDT project, didn't it create a StrataFrame database into your project? If so, copy the tables' structures from the StrataFrameSample in your DDT into your database (right click on the table name, then "Copy to").
After that you can delete the StrataFrameSample database from your DDT project, BUT PLEASE, GO TO THE "OBJECT NAME HISTORY" AND DELETE THE HISTORY ITEM THAT IS CREATED TO DELETE THE STRATAFRAMESAMPLE DATABASE FROM YOUR SQL SERVER, otherwise you will have the StrataFrameSample deleted from it too.
Hope it helps.
Cheers.