[Zope] Question about ZCatalog and SquishDot

Hi all, I was playing around with ZCatalog yesterday, and I ran into a small problem. I have a site that consists mostly out of DTML documents, but also contains a squishdot part. I was able to catalog everything, but apparently, the postings from the SquishDot part are not catalogued. I saw that squishdot maintains his own catalog, so I'm wondering if there is a way to combine that catalog in the main one that contains the rest of my site. Any ideas on how to do this? Cheers, Pieter