kharloss , if those firmwares do not work, then there is nothing much you can do. As the firmware extractor S1fwx only supports upto v9.0.43 at the moment. So others with working v9.0.50 are unable to dump their firmware for you to try on your player.
Why are clones called MP4 Players, when they don`t play .MP4 at all?
It`s like an MP3 Player which plays Music CDs only.
T39 doesn''t sound as good as my T29