[Zope] Best way to upgrade an existing Zope installation?

[Etienne Labuschagne]

Hi there

Maybe this has been answered a million times, but I can't find it.  What is
(generally) the best way to upgrade an existing Zope installation?
(Including products, etc.)

Must I export/import everthing, can I just copy the data.fs file or install
the new Zope right over the old one (and then recopying the data file)?

Thanks
Etienne

Tel: (012) 348 4586
Cel: 082 442 8981
Fax: (012) 361 8355