asp.net 2010 setup

I have a setup and configure question for working with Visual studio.net 2010 professional version. I have been assigned the support of an existing C# web forms 2010 application that uses IIS 7 that needs to be compatible with IIS 6.
I would like to be able to 'step through' code on my wokstation and still be using iis instead of the default web server that comes with visual studio called casini. I would like to have this type of environment so that my development environment will be setup to be like production as much as is possible.

Thus can you tell me and/or point me to a reference that will tell me how to install iis properly and tie the visual studio.net 2010 professional version so it is working with iis and/or probably iis express?

IIS is installed as part of the OS, so we'll need to know which version of windows your planning on working on ..