hey eng .. sorry but i dont get it u want to make backup .. or u have backup and want to load it to ur mp4 .. if u want to make new backup for ur firmware thats the way here (extract ur firmware and save it in safe place (u may need it in the future)) :
http://www.mympxplayer.org/how-to-ex...tool-vt66.html
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if u have backup and need to upgrade ur mp4 .. use the MP3 Utility .. u can download it from here :
http://www.s1mp3.org/files/3rdpary_s..._prog_v3.68.7z
i hope thats useful for u .. pls tell me wats happen
