Scripting kit components on a sales order

I have a unique need to conditionally create a linked PO to sales order for kit components. I am trying to find a way to set 'Create PO' = Drop Ship before submit for the individual components on the order since that field cannot be selected at the kit level.  It seems to me that the kit members might be actually stored on the transaction but this is a hunch based upon what I have seen before with line id's mysteriously skipping up.  I cannot default the item record to drop ship because for one subsidiary I need the item