I must admit I have no idea what you are trying to do. "Time from files in the bin folder and the site working" makes no sense to me
However a simple google of the term
ASP.NET Compilation iis 7.0
Gives:
http://www.google.co.uk/search?hl=en&safe=off&client=firefox-a&rls=org.mozilla%3Aen-GB%3Aofficial&hs=tiV&q=ASP.NET+Compilation+iis+7.0&btnG=Search&meta=
Which then gives things like:
http://technet2.microsoft.com/windowsserver2008/en/library/750f3689-dc28-4c22-8a97-c33f7a8b29521033.mspx?mfr=true
http://technet2.microsoft.com/windowsserver2008/en/library/30884867-a56d-4f31-8143-be0f35a30f8d1033.mspx?mfr=true
But you have read all that already right?
OR do you not mean complie at all or just when the site first starts up ion IIS7 it is slower than in IIS6?