Change the DNS of you domain name by asking your domain registrar to make the following changes:
Add a CNAME record named 'www', and point it to cdn.sitemakerlive.com
Change the root or 'apex' A record so that it points to 220.127.116.11
Note: You can even copy and paste those instructions in an email. Your registrar will know what to do.
GoDaddy and 1&1 may not require the '.' at the end of cdn.sitemakerlive.com. The pointing should work without it.