Installation for testing on Windows with IIS -- getting errors on configure.php files

Hi,

I've had a quick search but can't find anything regarding this. I was wondering if there were any instructions regarding setting this up as a test server using Windows and IIS? I have got IIS running with FastCGI+ and PHP, just doing the MySQL install. But when I run through the pre-checks i keep getting the error regarding permissions on the two configure.php files. But both are set to full access....

Not sure what I am missing here.

Any ideas?