You JsFiddle included the external script just fine, you just had some syntax errors in your script.
currentFunc was removed from SudoSlider in version 3.0.0, so i don't know why you are trying to use that.
Was it something like this you were looking for? http://jsfiddle.net/eS5gQ/3/
var sudoSlider = $("#slider").sudoSlider({
customLink:'area.customLink, a.customLink',
prevNext:false,
updateBefore: true,
afterAnimation: function(t){
if (t != 1) {
$('#controlsId').stop().fadeTo(500, 1);
}
},
beforeAnimation: function (t) {
if (t == 1) {
$('#controlsId').stop().fadeTo(500, 0);
}
}
});
I made the slider go to slide number 2 after 2 seconds, to emulate someone clicking a thumbnail in your thumbnail navigation.