Selection screen 1000 as subscreen?

Hi guys,

I have created a report with screen 1000 as start screen and selection screen (this is automatic). I would like to have the selection screen and the result list on one transaction. To achieve this I have created a subscreen and a container for the result. I dont know how to change screen 1000 to a subscreen. When i create another screen as subscreen and add to my selection fields the name of the new screen as a subscreen everything get confused. How do I get only my main screen and the contain of screen 1000 as a subscreen. Can I deactivate screen 1000?

Thanks