That device runs on the Anyka processor. What you need can be found here:
http://mininetbooks.your-board.com/
However, you have to obtain "knight" status there before you can be allowed to download the files you'll need.
Another possibility is to reflash the device with the ROM from the CnMBook Silver, which runs on the same processor:
http://cnmlifestyle.com/
As always, however, reflash at your own risk. Be sure to follow the instructions carefully, because any mistake may render the device unusable.