Part Number Change/Replacement

I have been instructed (key word here) to change part numbers in Epicor. The strategy we are planning on using is to create new part numbers with a prefix to the originals and then transfer inventory, costs, etc.

Due to the amount of parts (several thousand) I need to use DMT. Has anyone done something similar?

Creating new parts is easy and we already have a process outlined for this but updating BOMs, transferring costs and inventory etc. from the legacy part is the important part and not something I know how to approach.