[Zope] Zope-2.5.1 + OpenBSD-2.8

Howdy -- I am trying to install Zope-2.5.1, my OpenBSD-2.8, with Python-2.1.3, and it is failing? I did see an older post about using the a (thread) lib from OpenBSD-2.7 but I don't have 2.7? Is their another work around? TIA, David --