Customize the Samsung Keyboard?

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after seeing this thread http://www.samsung-omnia.org/index.php/topic,199.0.html

you just have to declare which keyboard layout to declare and which file to use, im thinking we can create a copy of the layout files, then give it a new name and change some things inside it, like replacing some keys with tab? cause i miss the TAB key.

any thoughts on this? i saw some files like XML, BMP, KDB and MAP, maybe a little more understanding of this files will enable us to customize the keyboard.