Brian,
There is a way to to export your old emails and import them into your new email program. If you are uncomfortable working with computers, it might be worth asking a friend to assist you. It will not take them long to do this operation and it would be worth taking them for a pint or two at your local after you finish.
Just figure out what you want to keep data wise (Email, Word Docs, Pictures, etc.) before your friend comes over, so you can give him/her the list when they are ready to start.
Take Care,
Richard