I have backups of the Data.fs that aren't too old, but for some reason I can't get a working copy of Zope installed! What Zope version you used before? As I see now you're installing 2.9.6.
I follow the tar, configure, make, make install, make instance without throwing anything special at the configure, I prefer: as root: configure --prefix=/opt/Zope/2.9.6, make, make install as zope: /opt/Zope/2.9.6/mkzopeinstance (there you'll create new user and new instance) as zope: ./zopectl start (from instance/bin)
If this works and you're able to login to ZMI, try to copy your old data.fs to instance/var. To add new user, stop your Zope instance and go to instance/bin/zopectl write:
useradd user passwd (or adduser, I don't remember)
-- Maciej Wisniowski