PPC Would like to add Core parts and link them to the Main part on the fly

Creating parts with cores to the system is very cumbersome from a PO. The way it works now the only correct way to do it is to back out of the PO, create the CORE first, than the part and link them. There's got to be a better way to handle this situation.

Imported from [WISH-124] PPC Would like to add Core parts and link them to the Main part on the fly.