Setup Magento Multisite on Apache server running Plesk.

General information for the business: Setup Magento Multisite on Plesk.
Description of requirements/functionality: We require our server setting up so that Magento Multisite works with multiple domains.

eg.
shop1.shop.com
shop2.shop.com
http://www.magentocommerce.com/knowledge-base/entry/overview-how-multiple-websites-stores-work

Going to the same magneto installation, but to different websites within magento, these are already setup within magneto.
We just need the server stuff sorting out for us.
Similar to this.
http://dx3webs.com/front/2010/08/05/magento-multistore-setup-under-plesk/

Server is hosted with mediatemple (DV)
Magento is 1.6
Specific technologies required: Apache, Plesk, Magento
OS requirements: Windows, Mac OS, Linux
Extra notes: