Xfer of Netscape 4.7 e-mails into 6.2

After recently installing 6.2 on a computer which has 4.7 (and still does), I am at a loss as to how to get my e-mails and the respective folders in which they reside, transferred into 6.2. I was able to export my address book out of 4.7 and then import it into 6.2, but I cannot find a similar feature for my e-mails. What are my options? Can I open them from, and/or transfer them into 6.2?