well… why should it be different? you can make it different but it should work as it is.
for the movement you can rely on either the ralph-example or the other samples. usualy it depends on how you want to move your character but usualy it’s very easy once you understood how panda works.
and for the grid… either look at the picker-example (chessboard) or calculate the grid from the playerposition. just divide it trough the grid-size.
btw. asking questions is ok^thats what a forum is good for 