How do I integrate an asp.net web application into an existing web site?

Hi,

I'm trying to follow the below link in regard to integrating BlogEngine.net into my existing web site. I have already done the hard bit by converting BlogEngine.net into a web application as I thought I could achieve what I wanted through iframes but that approach has hit a brick wall (permission issues etc) so I'm now attempting to integrate the full BlogEngine.net code into my existing web site.

The below link provides a step by step guide on how to do what I want but I'm just wondering if I need to do the initial steps, i.e. copy the BlogEngine code into a subfolder within my existing site and change all the web.config files? Surely, since I have already converted BlogEngine.net into a web application am I right in thinking I can just add this web application project to my existing site and reference the code this way? But how will I then setup the web.config files correctly? What additional actions do I need to perform and where should I start from at the below link? Sorry, I've not really had any experience in combining projects together.

http://www.ajaymatharu.com/integrating-blogengine-into-an-existing-site/

Thanks.