[Q] How do i organize the homescreen from rom's file?

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http://forum.xda-developers.com – I need to mod a tablet, organizing the homescreen icons. But i need to do this for a massive number of devices, and i need to find a way to do it modyfing an apk or something like that, and flash it through recovery. I already found how to change the wallpaper, but no clue about shortcuts on home screen... Any hints? (HowTos)