<style>div#main.fullwidth {width:1019px!important;}</style>

<div class="iframe-wrapper">
<iframe src="http://bit.ly/9Sorg2" style="height:1000px; width:100%;" frameborder="0" scrolling="no" overflow="hidden"></iframe>
</div>

This is some sample code (with inline CSS style block above) to make your LSS page 1019 pixels wide, and then embed content from a third-party site. Be sure to set your template to "Full Width" to remove the sidebar, and adjust as needed.

Sample Embed Code

HTML