You don't need to do anything! The first time you register for a class at Saint Xavier it will trigger creation of your IMail account. Your user ID and password will be sent by U.S. Mail to your home address.
You don't need to do anything! You may continue to use the IMail account that you used in previous semesters. Your IMail account is not deleted at the end of the term. This allows you to keep the same e-mail address from one semester to the next.