I did it! TV output with overclock. Now I can play Fzero (snes) with 20fps!
I used the TV tool and the kernel mentioned on the first post. I also use a gmenu2x modified to allow overclock. I am copying the size of these files so you can have the correct ones on your dingoo:
TV tool (tvout.dge) is 9.920 bytes
Kernel (zImage) is 1.220.608 bytes
gmenu2x is 1.653.612 bytes
I created two links to TV tool. One with parameters "--speed 410" to turn on TV, and another to turn off with parameters "--off".
I set gmenu2x to 410Mhz by changing "menuclock" item on gmenu2x.conf. It is the same as changing from the interface.
The first time you tried to execute tv tool it does not work. Boot into the native os, turn the tv on and off, then boot into dingux and everything works fine.
You also have to change all your applications to 410Mhz (or any other clock you choose). To do that, press select on the application and edit clock settings.
If the application sets the clock itself, like snesx, you have to select a clock that is close (or equal) to the one you are using (in my case 410Mhz). If the clock is different, the image could be out of sync or BW.
Good luck to you all...