I explained in my instuctions that my version must go into the virtual root. You can install the app from the zipfile into a folder on drive C, then use the IIS configuration applet to change that folder to become the new root (home) folder of IIS.
I just used c:\ThePhileII and then I changed IIS to use that instead of c:\inetpub\wwwroot as the virtual root.
Then hit it with
http://localhost
Eric