I'd like to start using Outlook so I need to move all of the mail from Outlook Express. I've seen many articles on-line on how to do this but my question remains unanswered. I have many OE folders to keep my mail organized. But when I look into the Outlook data folder I don't see even an inbox file. If I follow the online instructions that I have found to move the mail into Outlook, will it maintain each of the folders I've created?

It is Outlook 2003?
The MS Outlook and Outlook Express both installed at the same computer?

Yes, Outlook and Outlook Express 2003. Yes they are both on the same computer.

Run the MS Outlook, then use File menu Import. In the Outlook Import Wizard choose the source application as Outlook Express and continue importing.

Yes, that's in the instructions I found. I'm wondering if Outlook will maintain all of my separate folders as separate files or if they are all put into one big DB file. Outlook Express maintains a separate file for each folder.

Yes, the Outlook should care about it.