Hi, could someone describe how to open and than debug existing IIS 7 - PHP web in VS 2010?

I have old PHP project created with PSPad only and now I am testing some better tools for PHP development for this web. On local PC I have IIS 7 with PHP installed but i do not known how to open (import) mentioned web to visual studio and debug it there. How to import it and what I have to set to start debuging of web?

With new project everything is working ok. I thought I can just copy all dirs and files from old IIS web to new created project but it does not working. I have dirs and files in project directory but not in solution explorer.

Luigi