Fixing a model

[Giftheck]

So, I've successfully trial-ran a model conversion to SWBF. However, as I want to use the model in game, I need to fix it so it works 100%.

Below, I have the model screenshot in game and I've highlighted how I want to fix it. Can anybody give me instructions on how to perform these fixes? I'm assuming I will have to weight certain parts of the mesh to bones?



So, some additonal notes:

-Shoulder pads: These need to move with the shoulders (nearest bone would be the upper arms I believe) but seem to be attached to the clavicle bones.
-Head: This doesn't move, it's pretty rigid. For this particular model, it's not 100% crucial though it might look a little more natural if it did move. However, it will be a problem for other models.
-Belt: I don't want this to move at all. It also looks like the gleaves and parts of the chest move when I don't want them to as well.