We've got several old "projects" in Fogbugz that have been closed or have ended over the last few years, some of still contain several open, but useless/nonapplicable cases. We don't mind leaving the old cases there and just closing them, the problem is that when searching for current stuff, the search results are all clogged with old, invalid stuff.
Is it possible to exclude case "projects" from the search index so that old material doesn't confuse the issue when searching?