Crystal Reports single parameters and multiple data source

Hi All, I have following problem with VB 2005 and Crystal report

1. I have created header with parameters defined manually and I pass from VB code

    which works fine but after I addedd following line :

     rpt_mf.SetDataSource(ds.Tables(0))

      Crsytal report started to ask the value of each parameter. Can some one help ?

2.  I have 3 tables that I need to capture certain data in crsytal report. The issue

    that I have now , I have Id that contains multiple rows in different table ( one - to

    many relation ). The issue is I need to display the ID and rows in single column, which

   not sure how to do since in single line I have some other details.

   Can some one help ?