How to add on screen button at framework for ICS

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http://forum.xda-developers.com – I'm using Xperia arc s at stock rom 4.1.B.0.587 and locked bootloader. I'm using few mods, and also custom systemui *Colored icons systemui Few days ago I am starting curious how to add on screen button at my own, and I still cannot do it successfully (got bootloop after xperia title). Can anyone help me? What I do: (following the tutorial from http://forum.xda-developers.com/show....php?t=1364757, and http://forum.xda-developers.com/show...43#post9126643 to mod the apk) 1. extract framework-res.apk from my system [framework-res.apk] 2. decompile it with 1.4.10 apktool by this command: (HowTos)