It's been, what, 5 years since 2007, and two new versions of Windows have been launched in that time (which is enough time for a feature to be depreciated and then removed). It's almost like asking why I can't run Windows Internet Explorer 10 on OSX; from the software's point of view it might as well be running on a ternary system
It's just that some (many) of the people here feel it's a waste of time to try installing an unsupported piece of software on an OS that's been pretty much completely reworked since its release, especially if you have easy access to a supported version of the software. Is there a reason you want to do this, or just for curiosity?
and since you requested some kind of guidance, a quick search brought up: http://www.microsoft...07-t165466.html