[Zope] re: Zope restore

I am a Zope newbie and have just ordered a managed server to run a web-journal on Zope. I recently had a little bother on my development machine and had to do a clean reinstall of the operating system. No, no, no! I did have a full backup :-). However I would appreciate some help on how to restore the data files i.e. where are they? And also any tips on what to avoid i.e. should I overwrite or simply add the data files to an existing folder etc. Many thanks Dapo