[Zope] Make site searchable

Hi! I'm working on an intranet site (using Zope). Now I need to make the site searchable. Tried using htdig, but without luck (should it work with zopesites?). Now I wonder - is there a builtin feature in zope that can fix my problem, or are there other programs like htdig that works with zope? Help is much appreciated! Sture Lygren