To create add-on domains:
  1. Log into the private server manager (
  2. Click on "List domains" and select the appropriate domain
  3. Choose the domain for which you would like to add-on domain to. You can do that by clicking on "list domains" and selecting the appropriate domain name
  4. Click "Create Virtual Server"
  5. Click "Sub-server"
  6. Enter the 'Domain Name' and 'Description' for the Add-on Domain
  7. Click "Create Server"