OK, I've tried it and it function!
As you write, not 120px images are showed and there is blue-tile background, but for now it is ok.
If you can, you can add support for 2 images live tile and large tile (I know that it's difficult, but you're on right way
Link to my website, translated with google translator
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allow to create desktop shortcut to windows 8 metro app
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Winddows 8 Lockscreen and Pattern Login simulator for all Windows!
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Resolve the "not appearing" touch keyboard issue in Windows 8