Those are 9png files. If you dont know anything about decompiling, recompiling, etc.. then you don't care so this will make your process easy. Normally, you wouldnt break a 9png files guides but since you wont be able to tell in this case, it wont really matter. Use 7zip or something and go into your ROMS system/framework folder.. find framework-res.apk. double click on it and go into the res/drawable-hdpi folder. Drag out all the jog-tab-xxx.9.png file to your desktop or into a folder. Don't worry, draggin them out will not remove them from the framework. Now, find the ones you want and use Gimp or paint.net to make the images fully transparent. (color to alpha). Use 7zip to stick them back into the same folder you took them out of. DO NOT.. unzip your ROM. install the ROM again without wiping data. good to go.
My motto has always been.. if you cant remove it, make it invisible!