Crosstab Sorting on multiple columns/Dimensions..

We're currently on DS 1.3 SP 02. I would like to check if there is an option in DS to sort Crosstab data based on multiple dimensions. I would like to sort CROSSTAB data in below sequence.

Material -> Sch Start Date -> Order

Is it possible in DS? I'm aware of method DS.sortByMember. It only allows one dimension at a time. Is there an option to sort based on multiple dimensions?

Thanks,

Milind