Do you have them saved as Folders? i.e. Inbox.dbx
If so, you can simply go to C:\Documents and Settings\Your Name\Local Settings\Application Data\Identities\{XXXXXXXX-1234-4D89-A307-XXXX222234XX}\Microsoft\Outlook Express and rename the existing Folders that are the same as your saved ones, with .old
Then move your saved Folders to this one. Reboot and you're in business.
brad