CMS Made Simple Forums

I'm running CMS v1.6.4 and would like help with a menu display issue.

I currently have a top level page with 7 sub pages. In the displayed menu, is it possible to show the top level as a heading only in the menu (ie not click-able) and then allow the subpages to be selected?

Only if the menu tag doesn't have collapse="1" in it, that makes the menu stay on top level and only open if top level is clicked and it has children...

Excuse my ignorance but which file do I look in to find the "collapse=x" statement.