Production order type determination for strategy 82

All,

We know that for strategy 82, one can have PO directly created and hence linked to the Sales Order.

Understand that checking control needs to be set up for the plant , order type combination.

A.] How can we influence the order type of the PO that gets created automatically? Say a ZP04 order type was created and I'd like to have this order type selected for PO creation whenever I create the SO.

B.] Also, if Sales order did have any blocks set up; will the PO get created after the blocks are released or at the instance when we save the SO?

Thanks.