should I be able to take a server that has been running BM okay, change
it's IP address in inetcfg, add it's original IP address in as a
secondary IP address, and expect services that had been configured for
what is now the secondary IP address to still function?

I'm having to redo some stuff in my lab (no, I haven't gotten my swap
and clustering in the live system to go yet...I had to interup that to
do this little bird-walk).

Just curious if it could be that simple or if there are some underlying
configurations I'd have to change too. I mean NW admin would have
already been set up to use what is now going to be the secondary IP