Partial DEL to single sales order with diff storage loc. in single DEL

Hi SAP gurus,

I have created a sales order with single line item of 100 Qty,

Now i want to create single delivery with two different line item with different STORAGE LOCATION as per the availabiliy criteri with those different storage location of the same or different palnt.

i had tried to create single delivery by manually putting second line item with different storage location,but i want this to be automatic by the system.

In case of any clarification kindy revert back to me.

Regards,

Ujjawal