Picture posting is enabled for all :)
Pretty sure Express stores your data in a .pst file, but not sure where. Try searching your C drive for *.pst. Once found, copy the file to the backup location (making sure you are not using Express at the time).When prog reinstalled something like : File-> Open-> Personal Folder, then browse to the backup. Once open copy into your new mailboxUse Exchange not Express, but think the above is correct. Someone more knowledgeable shouldn't be able to resist correcting me if not.
Sorry I was wrong: confused ordinary (non-Exchange) Outlook with Outlook Express.