You really need to be a lot more explicit if you want help. We don't have enough information to give more than very general ideas.
Tell us the partition structure and where the operating system(s) are installed on this machine. Tell us EXACTLY how and where you installed Windows 2000, and what you did with Windows ME. (Is the system now set to dual boot?) It sounds as though you did this without backing data up to external media. The time to look for the data and save it is BEFORE the upgrade.
If the Windows ME installation is still functioning you can locate the message Store Folder by going to the Tools | Options dialog, selecting the Maintenance Tab, and clicking on the Store Folder button. The location is given in the resulting dialog.
If the Windows ME installation is no longer available, you can still locate the stores -- if they haven't been wiped out. Outlook Express keeps its message database files in directory structures with Hex-compliant alphanumeric names in curly brackets under "Identities" folders. The Windows 2000 Search function should locate all such instances for you. The extension for a database file is "dbx". There will be one dbx file for each folder existing under each Identity. If you copy them to a known location without mixing files from different Identities, you can import them from that location using Outlook Express' import function. To do this go to the File | Import | Messages dialog. The Outlook Express Import Wizard will provide a list of programs from which you can choose to import. Choose Outlook Express 5 and click on the Next button. Click the radio button named "Import mail from an OE5 store directory", and click the OK button. The next page of the dialog allows you to browse to the store location where the old messages are. Beware that you will overwrite any messages in the current Identity when you import the files. You should probably create a pair of Identities. One will be where the new messages on the system are kept. The other will be where you import the old message stores. If you do this right at the beginning or don't already have new messages in the current store location, there's nothing wrong with overwriting it.
BTW, Identities are created in the Identities dialog under the File menu of Outlook Express. You parents can switch between Identities, the old one for reviewing old messages, the new one for sending and receiving current mail. IT IS IMPORTANT that they do not mix the purposes of the two Identities up! If they do, they'll have just new messages in one Identity and a mix of old and new messages in the other Identity.
In the Import submenu you can see the options for importing mail settings and address books, too. Has all of that been done?
Hope you get it sorted out.
Regards,
Jim
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