Advanced Guestbook and site searching

How do I include Advanced Guestbook entries in my site search/site map script?

When the script I use (FreeFind) indexes my site, it finds many duplicate entries. When it makes up a site map, those duplicates are included.

FreeFind lets you specify what directories or files to include in or exclude from its indexing, but I don't know enough about PHP or Advanced Guestbook to tell it what to do.

Currently I have disabled the Guestbook from all indexing, but of course now I can't search the entries, some of which are very valuable.