asp.net using iis express

Question

In a web form 2010 application, I want to know if I can use IIS express as the test server instead of using cassini. The production C# 2010 web application uses iis 7 that is compatible with iis6.

I know iis express is a newer feature of  visual studio. net 2010.

However can I setup iis express to use iis7 that is compatible with iis 6? If so, can you tell me if there is any special configuration required? Can you tell me what these special configuations are?

If not, can you tell me what my testing options are then? Can I only use iis and cassini? If so, can you tell me how to use iis in the vs 2010 debug environment?