I need to move our BM boxes to a new tree. What steps do I need to take?

I understand that I will need to remove the server from the tree by
removing directory services, but what about BM services. Do I just unload
the NLMs and edit AUTOEXEC.NCF to prepare for the move and then run vpncfg
after the server has been installed into the new tree?

I am using BM 3.6 on Netware 5.1 SP6.