I've attempted the install thrice so far and even attempted modifications found on the forums concerning PHP (Aspnet quotes, adding a default user to __config) and taking matters into my own hands by modifying the database directly to add a user account. I am using IIS 7.0 and MySql. The failure actions are different but I noticed a problem the first time, when I browse to http://mysite/ss/admin/ -- it asks for an email address and password, the Web Platform Installer just asks for a "username".
After reinstalling I used an email address for the username and got a tiny bit further. Going to http://mysite/ss/admin/ and entering the email address and password goes back to /security/login with a message "Please choose an authentication method and enter your credentials to access the CMS".. I also noticed that the URL at top becomes:
Can anyone point me in the right direction?