Manipulating the structure of a group tree

Hi,

I am using Crystal Reports XI (Release 2) in C#.Net for a Web page, which upon request, gets dynamic data from MSSQL Server 2000, applies the .rpt template and then exports the report to a PDF file.

Let's say that the following is the data i'm using:

Column1 Column2

-

-

value1 value2

value1