Prompts as Dataproviders

Hi,

I am trying to change data source for Webi Reports using Prompts. I have Multiple dataproviders in my webi report eg: Universes, Bex, excel..

. How can i create the prompt in webi for dataproviders.

. Can we do both in Input Controls and/ in scheduling prompt as iam going to schdule the reports.

. When user selects dataproviders where universe1 then I am expecting universe1 table block in the report similarly if user selects universe2 then I am expecting universe2 table block in the report Similarly when user selects Bex Query then I am expecting bex query table block in the report etc..

Can anybody help me with an sample or snapshots.

Thanks

Dinya