[2005] Running ASP and ASP.NET side-by-side

What is the best way to connect an ASP and an ASP.NET site?
I just tried it using query string and it works but is it possible to use Session Variables that was initialized from an ASP page in an ASP.NET page?

We need to launch immediately some new services of our company in our site but I need to use ASP.NET2.0.
The full migration of our site will be finished in approximately 2-3 months, we must follow some target dates.

http://searchvb.techtarget.com/tip/1...951935,00.html

Thanks.