Distinguish between header row check and detail row checked state

[tsbalaji69]

Hi,
I am able to group by the rows based on two columns with multi select set to true. I would like to have a grid by the example shown below in the image.

In the above image I would like to have the group header row as shown and should be able to retrieve the values of the header row if selected by the user.
Kindly let me know if this is possible using jqgrid.
Thank you,
regards,
balaji