Selection of Routings during planning

Hi,

I have a small doubt during selection of Routing ducting Planning.

It is possible to select different routings when u create a production order (manually or converting planned order to production order) but is it possible to select different routings group counters for the same group while creating planned order or while running mrp or after running the MRP is it possible to change the group counter for the planned order.

please help solving this doubt.

Pavan