How do i create a smoother isometric movement?

I’ve used the “simple example” actionscript found in the isometric section. How do i create a smoother movement between the grid instead of it just jumping to the next square. Also i would like a movie clip to be played in between e.g a person animated walking from square to square rather than just jumping to the next square.

Also how do i make the movieclip face in the direction its going? e.g a person walking and when up is pressed then the person would face up.

Thanks