I'm up for that. Anything that would streamline the development.
If anyone wants to know, I'm currently using MoveTo Behavior plugin ( but this technique can be done with any movement type, but would have to be slightly modified to adopted the movement, for example direction and distance to pass before next call). I've created object text variable for the sprite I want to move with value like this
864`960__864`736__864`536__464`536
and numeric variable that holds steps made. Also I have one more variable UpDown that is responsible for reversing the movement pattern.
The events sheet looks like this
<img src="http://img11.imageshack.us/img11/7234/gpcu.jpg" border="0" />
Hope that helps!