I'm afraid things are very different in LLBLGen Pro. The main thing you'll run into is that in LLBLGen Pro we're not using datatables anymore for data storage, but entity classes.
You can add stored procedure calls to the llblgen pro project and generate call code for them to for example fetch data into a datatable. However the main power of llblgen pro is in entity usage, something you'll miss out if you're using just stored procs.
