http://www.support.microsoft.com/?kbid=270670
OLEXP: How to Back Up and Recover Outlook Express Data
The Address Book - Select File, Export
Choose Text File (Comma Separated Values) as the export option, as this can be easily
be imported into Outlook Express and any standard database software.
Note: exporting the Outlook Express address book using this method only works if you
do not share your Outlook Express contacts with Outlook.
To back up or copy your Outlook Express address book:
1. Select Tools | Address Book... from the menu in Outlook Express.
2. Choose File | Export | Other Address Book... from the address book's menu.
3. Select Text File (Comma Separated Values) as the export format.
4. Click Export.
5. Select the location you want to export your address book to using the Browse...
button.
6. Give your backup copy a meaningful name.
7. Click Next.
8. Select the fields you want to include in your backup.
9. Finally, select Finish.
10. Click OK.
11. Click Close to end the process.
To restore or import Outlook Express contacts from a backup copy:
1. Select Tools | Address Book... from the menu in Outlook Express.
2. Now select File | Import | Other Address Book... from the address book menu.
3. Highlight Text File (Comma Separated Values).
4. Click Import.
5. Use the Browse... button to select the backup copy of your Outlook Express address
book.
6. Click Next.
7. Now click Finish.
8. Select OK.
9. Click the Close button.