DateTime static parameter setting currentDate as default parameter

Hi

I am using Crystal Reports 2008 designer,

I have a Datetime static parameter with optional default prompt. If I am not selecting the parameter I would like disply the systemdate or currentDate in the report.

But the parameter screen is not allowing to give the currentDateTime option ,instaed I have to give a value like "2009/09/09 12:12:12"

Is there any workaround for this?

Thanks

Jorge