Subscribing to .ics feed in Windows 8 Calendar app ...possible?

Hi, I'm using Windows 8 RTM on my MacBook pro (Late '08) and it works really great so far. With dynamic ticking disabled, that is.

That said, I've made a PHP script that dynamically generates an .ics-file which I can subscribe to on Mac OS and iOS perfectly, but I have yet to find out how to subscribe to it with the native Windows 8 calendar app. I searched the web without success, so I'm asking you, Vergers! Thanks in advance.