I have the same problem, I have installed easyphp whih is a combined installation of mysql, apache and php from http://prdownloads.sourceforge.net/quickeasyphp/easyphp1-7_setup.exe?use_mirror=kent (the easyphp.org website is down at the moment). The default language is french but you can double click on the icon on the tool bar to change the language to English.
To get it to work you uninstall mysql which you’ve presumably already installed (before I did this it said that the port was already in use).
Now I set the path variable to include the new php.exe and hey presto, I run install.php from the command line and get a new set of errors to work through.
