Not sure if this can happen easily. The issue for me is that the non-cmsms site is on a windows box and separate because it runs ticketing software that only works with that setup and limits access to the structure of the site; but there is a field for common html to appear on all pages . . .
I've seen this discussion: http://forum.cmsmadesimple.org/viewtopi ... ic=13379.0 but I don't think it's quite the same thing . . .
I saw that the CMSMS site does it for the blog and would love to see code/how?
From: http://www.cmsmadesimple.org/about-link ... s-website/
What about the forum?
We use phpBB for our forum because we feel it meets our needs best, and it saved us from having to write one from scratch.
A theme was written for phpBB that allows us to duplicate the menu and some of the colors from the main CMS site and implement it on phpBB.... we don't use iframes, or any other tricks.
The only creative thing done on the forum is the menus. Our theme designer wrote some creative (but simple when you look at it) code that extracts the menu structure dynamically from the CMS Made Simple website on a regular basis, so that changes made in the site structure on the website automatically appear on the forum menus too.