You'll need to be signed up for OpenShift and set up that account. Login there and edit your aliases.
Next, login to your iwantmyname account and in your domain's dashboard, you'll add the two DNS records as shown below. You can add them manually, then save the new settings, or you can use our one-click install. Just start typing OpenShift in the search field to bring up the drop-down option, then click on it or press Enter.
On the next page, enter your OpenShift app name, then click the Install button.
Your specific CNAME value will be different from this example, of course.
Next, login to your WordPress dashboard and go to Settings. Add your domain name there and update any other settings and descriptions. Save those new settings and you should be all set!
If you have any questions or need additional help, just let us know.