When an item is set up as a manufatured item, along with adding the units that are needed, the user should be able to create an instruction guide that will print when the manufactruing job is created and printed:

i.e At the bottom of the box place SKU#1, above SKU#1 place SKU#3, then add crinkle paper around, above the crinkle paper place SKU#2.

This would allow the warehouse to know for each production job what the requirements are that they need to follow.