Shift Planning related issue

Dear Guru's,

In shift planning simultaneously we ve the option to default only only one standard shift group. But my requirement is to map two shift group in one system. Is it possible?

The scenario is as such two different company sharing the same one server. For one company I used the PS grouping for DWS grouping is 40 and for other I used 60.But in shift planning I'll proceed with two different Shift Group. But in system there is the option to assign only one shift group.

Please guide..

Thanks,

Santosh