Hi, you can backup your emails in outlook express by the following method:
Go Tools, Options
click the maintenance tab
click store folder
copy the location you see in the box making sure you highlight all until you see outlook express at the end of the line
click OK
paste this into the run box in start menu and the folders will come up, then copy these to another location.
To copy back to outlook, do the following:
click File, Import, Messages
select microsoft outlook express 6, click next
tick import mail from an OE6 store directory, Ok
Then browse to the folder where they are stored, click next and select all folders.
Note sometimes you can't install from a CD location as they don't get recognised, so copy to the HD.
Hope this helps/