Hi,
One simple step is to rename the regedit, and this does not have to uninstall anything.
example:
In one client CMa, you go to regedit and delete the name in the site(delete CMa name)
Go to: Start / Run: regedit
HKEY_LOCAL_MACHINE \ SOFTWARE \ Hewlett-Packard \ OpenView \ OmniBackII \ Site \ CellServer (Data = Cell Manager name)
In the name you can put the CMb and then go to the GUI on CMb and export this client.
If it does not work ,just delete the name of CMa and export it in the GUI CMb that client and it should work.
And with OB2PORTRANGESPEC you only change the corresponding values
I hope this helps.