@lav4you,

You (we) may want to continue discussion e.g. here http://talk.maemo.org/showthread.php?t=83643. Thread is about using xbindkeys to controll stuff using the keyboard.

I don't know if there's a standard "signal" that touch-only apps could recognize to tell them to move up/down. I guess it's depends a lot on which program it is.

What might be possibly possible is to build a fake mouse driver being controlled with the arrow keys. A bit uncomfortable, but might be useful when xbindkeys is not enough..