In the “Texture Coordinate Editor” you will find by using the move scale and rotate buttons, you will be able to line up your bmp to your model very easily. If you click on select then you can choose any of the vertex’s and move it to better align your bmp. It will not effect the position of the model. And if you move the window so you can see the 3D view you can see the placement in real time. Some times you may have to click in the 3D view to see the change as you move the skin to different positions. And if you need a larger view in this window for fitting your parts at the bottom where it has Scale just type in 2 or 3.