I don't think there's a way to do that. I've needed to do it on a bunch of other threads as well.
I'm looking into a few new features for the forum that would take care of this issue as well.
Perhaps taking all of this and putting it into a wiki is a good work around for now.
One of the mods i'm looking into will take our wiki and integrate it better int the forum. it looks like it will also allow forum discussion on the articles.