Ok here is what you do make a raw folder in your cache then add them in there then go to client.java (client sided) then search preload then uncomment preload also look at the location from where it loads the models from it should be.
Code:
public void preloadModels() {
File file = new File("./Raw/");
File[] fileArray = file.listFiles();
for(int y = 0; y < fileArray.length; y++) {
String s = fileArray[y].getName();
byte[] buffer = ReadFile("./Raw/"+s);
Model.method460(buffer,Integer.parseInt(getFileNameWithoutExtension(s)));
}
}
Then add the ints in itemdef.java also add the item in item.java