IDE :: Adapting Kirupa's "Adding Thumbnails" Tutorial (MX 2004) Into Just Plain Old MX?

continue the success with incorporating the scrolling thumbnails feature to my current galleries.I have done my best to incorporate the code from Kirupa's "Adding Thumbnails" tutorial to my site, but have a feeling the loader class is only MX 2004 and on, and I'm using plain old MX. I have absolutely no thumbnails showing up at all.

PS I also found two discrepancies in the tutorial:

1. Initial code to be pasted has a line such as this:

Code:
target_mc._x = hit_left._x+(eval("thumbnail_mc.t"+k)._width+5)*k;

and later in the tutorial that same code is treated as this:

Code:
target_mc._x = hit_left._x+(target_mc._width+5)*k;

2. Initial code to be pasted has a line such as this:

Code:
}else if ((_root._xmouse<=40) && (thumbnail_mc.hitTest(hit_left))){

but later in the tutorial when it's broken down it's listed as this:

Code:
}else if ((_root._xmouse<=(hit_left._x+40)) && (thumbnail_mc.hitTest(hit_left))) {

It's very difficult to test all possible variations in this, but I think I have, as there were 4 possible combinations since 2 lines of code varied. But none of them worked. Either way, would be good to know which users should be using. A little help in identifying: "snowThumbMC" is the name of my empty movie clip instance on my stage, in which I should be loading all of the thumbnails.

1. Is "target_mc" the name of an actual movie clip I should have on the stage somewhere? Or is it simply an empty one created via code to hold info?? I'm trying to figure out what exactly "target_mc" refers to.

2. Is "pictureValue" an actual value of a variable named "picture"? If so, should I have this variable on stage somewhere? I'm just not sure by reading the code (since I can't properly read it) what exactly "picture" refers to.

Code:
function thumbNailScroller() {
// thumbnail code!
this.createEmptyMovieClip("tscroller", 1000);
scroll_speed = 10;

[code].....