Code:

in save button:

on (release){
_root.pos = SharedObject.getLocal("cookie");
_root.pos.data.picture = _root.picture
}

in load button:

on (press){
_root.pos = SharedObject.getLocal("cookie");
_root.picture = _root.pos.data.picture
}
on(release){
if(_root.picture==1){
_root.gotoAndStop(2);
}
if(_root.picture==2){
_root.gotoAndStop(3);
}
if(_root.picture==3){
_root.gotoAndStop(4);
}
} (less info)