MNPages Test Oven
mmmmm.... now that's good websiteWrapper Module
The Wrapper module basically lets you stick another page or site in to the middle of your page. You provide the URL and height of the window. The width is determined by the page template. Scroll bars will automatically be added as needed.
This is illustrated blow by showing the DSR Designs web site in the window below.
This module uses a basic iframe to load the other url in to the current page. There are other ways to do so that allow for a better integration, unfortunately because of the way php is configured on most shared server environments, the other modules are not always an option.