Out Side Services on BPCS CD

Here is two separate questions / issues in doing outside services.   Maybe 
someone can share some advice.

We are doing more outside services.    How do you create paper work to 
ship items out?   Today we hand write misc. Packslips and Bill of Ladings?
Today we have an operation on a shop order for out side shipping.    The 
dispatch list for that work center creates a list of items to be shipped 
out.   We then have an  operation / workcenter to receive back in on. This 
helps us track where the parts are. 

Then we create a PO for an item representing the Outside charges.    This 
item is then received in and issued to the Shop order.   This applies the 
cost to the shop order.     I have been testing the way a PO can be tied 
to a shop order and operation.    I noticed the "OO" - outside receipt 
transaction.    What does this transaction do differently than the "U" PO 
receipt.

Thanks

Roger Henady
Thorco Industries