I've just found this:
http://www.mp4nation.net/forum/viewtopic.php?f=6&t=1967
And I think that it's the one under "For VX858LE clones with built-in camera (Rockchip-based)"
But there's not the little arrow in the top right, so I'm not sure...
EDIT: They look like a lot, but it's not them. Nice try to me^^