Documents and Folders/?'YOUR PROFILE'?/Local Settings/Applcation Data/Identities - if your 'tecchie' did the proper job they will still be there.
If they are in W98 they should be in the 'windows'/Application Data/Identities folder.
In Outlook Express you can click on Tools/Options/Maintenance and change your store folder to the one you just found - or just 'import' the emails from it.
Good luck!! Sorry about the multiple syllables