The address book is a file called username.wab (the part before the dot is your username), if I remember correctly. Searching in your Documents & Settings for *.wab will certainly find it.
If you didn't make a backup of it, I'm afraid you lost the contents. Which prompts the question: why didn't you make a backup?
But you can try to have a look in Notepad to see if what you see makes sense to you.
Recvd msg that address book is damaged and "need to reinstall". Searched all MS support docs and tried everything they suggested including 3 pgs on instructions on how to manually uninstall and reinstall but no luck. windows XP with ms office installed on this machine. any ideas on how to repair the address book or do a full and clean reinstall of outlook express? (also, when attempting the instructions from microsoft they told me to delete certain files in c:\Program Files\Outlook Express\ but as soon as I did the files re-appeared. This also happened with a few of the .dll files they said to delete from another location). Thanks for your help.