>>>>From your desc it sounds as if the UI could work the same on both states -
>>>>that makes it automatically a biz rule...
>>>
>>>Thanks, that's my feeling too. Now how do I do this in MM.NET?
...
>Any help appreciated.

Dunno MM.Net, so may be totally off base,
but I'd look for an action method called by a save GUI event
[hoping that you work with a definite save button and not some rule]
In that action method fork either into update or do a new() followed by copyInfo()

HTH

thomas