What do you get when you cross an HTC HD7 with a Mondrian ROM? Or a Schubert ROM? ('Elephino wait, that's not right.) Nothing too crazy, we imagine, but in doing so, xda-developers patron ansar.ath.gr has provided a proof of concept that custom ROMs can be implemented on Windows Phone 7 devices. In more technical terms, "this proves that the imgfs.bin can be used from any branded device to any other branded device." It's okay, you don't have to know what an imgfs.bin is, but if you're the sort who likes to tweak phones wel