As long as ya backup your mail/files in the folder:
C:\Documents and Settings\username\Local Settings\Application Data\Identities\{DA7538B1-74D9-41DB-B928-B1271501152B}\Microsoft\Outlook Express

Then add remove oe through windows components in add remove programes, resetup your idenity

then copy the files back into the folder, ya should be good to go.