well, I compiled the firmware with these, and the good news is that the screen is working (little bit flickering but you seemed to have the same experience), although the source is prepared for smaller screen, so all the bitmaps are up to the left. The bad news is that this touchkey driver is not working for me
The backlight of the keys are turned on all the time, and the keys do not response. I have a power button to turn it on, and it turns on, shows animation, but thats all, I can't even turn it off, fortunately there is another power slide button to cut off the power. Despite that, the firmware seems to work, it gets into usb mode and main menu, also access to the flash memory works (so I was right - TeclastC260 has MLC flash), as low level format is being done successfully.
Interesting thing is that it works much faster than original firmware, It shows main menu just a second after pushing the button, not like in my original where I have to wait 4-5 seconds and watch stupid animation. Also when I connect it to the computer I dont have to wait like 2 seconds before it go, it goes into USB Mode immediately.