PM box suggestion

Hello,

Would it be possible to have folders and/or filter options in our Private Msg boxes not just generic Inbox / outbox/ Unread tabs. Something similar to Gmail or Yahoo. It gets tedious searching or sorting through my messages. I would really like to keep my messages sorted by folders..example for my Fan Fiction PMs/ official correspondence, from close friends etc..

Would me mucho grateful if u would consider my request.

Thanks for listening.