Step one:
Upon starting up Outlook Express, you may get a popup window that says "Internet Connection Wizard" in its title bar. If so, skip down to step two.

If you don't get that popup window, then go up to the toolbar (where it says File, Edit, etc.), and drop down the Tools menu. Scroll down to Accounts, click on it, and you'll be presented with the window shown on the right.

Now, click on the Add button in the top right of that window, and click on Mail. You will then be presented with the Internet Connection Wizard.

Step two:
In the first step of the Internet Connection Wizard, you are asked to enter your name. Type that in, and press the Next button.

In the second step, you are asked to put in your email address. This is whatever alias you have chosen followed by "@wamail.net" (without the quotes). Enter that and press Next again.

The third step of this process asks for the E-mail servers. Make sure that the incomcing mail server is set to a POP3. In the Incoming Mail box type in pop.wamail.net, and in the Outgoing mail box type in smtp.wamail.net. Hit Next.

Now you are asked for you account name and password. Your account name is typically your first initial followed by your last name (ie. jdoe for John Doe). Your password is whatever you chose when your account was set up. Put these in their respective boxes, hit Next, and in the following window hit Finish.