Thanks for the reply.

1/ I know nothing about coding, so guess I can't write shell scripts (for now). Instead I've found xbindkeys. Haven't tried it yet, but I suppose it can bind the keys to xdotool command.

2/ I did. Actually I did a very thorough search about it. And now I'm able to configure it as I wanted (ie. map any key to any position on the screen). It uses gconftool. It looks interesting since it looks like real multitouch rather than some "fake multitouch" by making use of the middle point.

P/S: The bad thing about resistive screen is that if 2 point is touched, it uses the middle point. It's better if it's the last point that is touched.