How to build multiple head grid in version 1.0

Hello to all,

I am trying to construct header of grid that allows me group two columns of header like daughters of another column. For example header "Telephone Calls" is father of the header "Called call" and "Long distance calls". Somebody can say to me if it is possible to do it with this Tool?.

This es:

Telephone Calls
Called call | Long distance calls
11111 2222222
33333 333333

Thank you.