SSRS 2008 R2 - Stop auto generation of report parameters

Question

When adding a new Dataset to a report based off a stored procedure that has parameters (say @MileageLow and @MileageHigh) sometimes those stored procedure parameters are propagated into the actual report parameters. Is there an option like "Auto Generate Report Parameters" that I can uncheck to prevent BIDS from performing this action?

Answer 1

What I do when only having drop boxes is add a <Please Select> with value NULL to the drop down via UNION ALL (if based on query). I then set this to the default, and in the main report dataset add a big fat

IF  @MileageLow IS NULL RETURN

Answer 2

The answer is to specify the report parameters during the creation of the DataSet itself.
I was in the habit of just creating it and then going in after and setting the parameters.
SSRS assigns parameters automatically on a best guess basis.