X-salor.
only place i found folder use is in the user cp dealing with subscribed threads,
currently i have over 200..
when you go into the cp it shows your most recent subscptions first.
but there is a link on the left, in the green bordered menu labled
Subscribed Threads menu,

Folders
Flat plane Subscriptions WCI Carving TIPS List Subscriptions Edit Folders
i went into the subscptions, they have little click boxes on the right, for selecting,
if you edit folders you can create your special one where you want these subscptions, i called mine TIPS for carving, then selected about 10 subscptions and moved them into that folder.
now if im still subscribed ill tell when somebody has a new post.
hope this is helpfull...