Ok as i understand i can use the middle buttons to execute other programs or choose other options if i will change the settings in picker_list file. Any ideas what cool things can be done with them ?

Yes.

On mine, the four choices are:

Volume adjust OFF
Volume adjust ON
Play Tetris
Start Displayserver

You see, I've modified my init so that displayserver doesn't automatically launch at boot-up. So I only activate it when needed, from the front panel.

If you need more than four choices, I'll bet you could daisy-chain scripts.

There is also another selection program (I forgot who wrote it, sorry, anyone have a link?) that allows infinite choices because it does a left-right scroll-to-select. I chose to implement the single-button picker instead because it suited my needs best. But you could easily replace the picker script with this other selecter if you wanted.

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Tony Fabris