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
My exlusive games, application, hacks, tweaks and more
> ModernApp Link 2.3 allow to create desktop shortcut to windows 8 metro app
> ModernBack changer 2.8 let you to change accent colors and background in Windows 8 RTM
> ModernLogin 3.0 UPDATED!!! Winddows 8 Lockscreen and Pattern Login simulator for all Windows!
> ShowTabTip 1.0 NEW!!! Resolve the "not appearing" touch keyboard issue in Windows 8