first of all am kind of beginner in modding world and i have xbox 360 slim which is lt 3 my question can i use free style themes "FSD" or some other themes ? INFO : i play online with no problems dashboard : 2.0.17150.0
Nope, your console is just flashed by the sounds of it. You can not use anything to do with FreeStyle Dashboard. You can however make use of the Xbox 360 Themes we have posted up on Digiex