How can I set up my yahoo plus with imap to send or merge mail folders to mobileme?

In the the MobileMe Apple product, I can access my Apple Mail and Yahoo Mail, but I want to merge or forward my stored folders to the MobileMe server to consolidate all the files in one location. I am told that if I can configure Yahoo Plus to IMAP, this may be accomplished. How may I accomplish this feat?|||Unfortunately, Yahoo does not work with IMAP. You have to use POP.