1. sign into your account at www.myxer.com.
2. Click on the “Share” tab at the top right of the page
3. Find the box titled “Artist Resources”
4. Click on the “Custom MyxerCode” link
5. Type what you’d like your MyxerCode to be in the text box and then click the “Continue” button

Note: Once you create a create you vanity MyxerCode you cannot change it, so make sure you don’t pick something you’re not going to regret.