@William: Ok, I'll see what I can do

The package name is now declared as org.xith3d.loaders.MD3Loader;
Quick tutorial on how to use it:
First we declare our loader MD3Loader loader = new MD3Loader();
Then we attempt to load our model which is composed of 3 parts: upper, lower and head mesh.
loader.LoadModel(FileDirectory, ModelName);
In the example that comes with the zip file, my model name is "supersonic" and is stored into a sub-directory named "supersonic" as well.
In order to successfully load the model to your scene, it is very important that your files obey the following naming convention:
ModelName_lower.md3
ModelName_upper.md3
ModelName_head.md3
ModelName_lower.skin
ModelName_upper.skin
ModelName_head.skin
ModelName_animation.cfg
If we have a weapon model that we intend to load as well, all you have to do is:
loader.LoadWeapon("WeaponDirectory", "weaponName");
You don't have to worry about nasty exceptions since I manage them within the loader file.
Now that we loaded our model, and assigned a weapon to it we call
BranchGroup scene = loader.getScene();
Where scene is the compiled BG holding your model.
PS: Hey William, if you downloaded the loader, could you try running it with a colored background?
Mine crashes to the desktop after running for few seconds
