Change of Invoice GL date at Header level should change line GL dates and Distibution GL dates by de

If we have an invoice (Never Validated) with 200 lines and invoice GL date, Line GL Dates and Distibution GL date as 29-Oct-2012 and we need to validate it on 2-Nov-2012 with all GL dates to be changed to 2-Nov-2012 then currently we need to change all dates manually at all places which means user has to do the action of changing dates more than 400 times.

Is there any way by which if we change the GL date only at the invoice header level the GL dates for all lines and distributions are changed as well automatically ?