Exporting Netscape Messenger to HTML

Chris Carlin asks: "I've been useing Netscape Messenger for years as my main email client, and I think it works great for my needs. Anyway, I tend to be a packrat with email and save just about everything. As a result I now have thousands of messages organized and taking up much space on my hard drive and I'd just plain like to get the stuff off my disk onto CD. I'd like to export in such a way that I won't need Communicator to read them at a later date, which brings me (finally) to my question: since Netscape doesn't seem to have a way of exporting all messages to a tree of directories of HTML files, is there a program that could? What else could I do with them that would preserve the oragnization but not require that I keep a copy of Netscape on the computer forever if I want to have access to the email?"