CMS Made Simple Forums

Does anyone know a way I could use the Search that comes with CMSMS to just search a particular part of my website (content page tree)?

Basically, I'm running one CMSMS install with two distinct sections, and I'd like the search that's on each just to work inside that section.

I couldn't find a parameter for the tag in the search docs so does anyone know of any tricks or workarounds I could use?

Thanks for any help in advance