Best practice for embedding external page - special case

I am helping a friend with a website for his church. Some of the work in progress may be seen at:

http://74.220.215.244/~loveand7/?q=node/54

they have made contact with a company called Faith Network to create for them a media player for their sermon series. The player is designed to dynamically change its content based on which sermon series the view clicks. unfortunately, the player does not provide typical embed-type code for a media player. Instead, Faith Network builds and hosts the player on their own server, and have requested us embed the page via iframe. The issue I am having with the iframe is that I dont know how to make the main content region in Drupal scale dynamically based on what the content of the iframe is doing. The external page that i must load is an .aspx page, if that matters.

I have plenty more information, including some script samples provided by Faith Network for anyone who can help. Let me know what information you need to be able to help me.

thanks in advance.
-myk