I answered Q1 in your other thread.
Q2: There is a much easier way to position 'any' dead body or creature.
1. Make sure the NPC or creature you are using has 0 health.
2. Drag the NPC or creature to the render window to place it in the world.
3. Press the F4 key to 'see' the grabbable points on the body. The F4 key toggles the Collision Geometry on and off.
4. Click the havoc button and the body will fall to the ground. Do NOT unclick the havoc button until the body is in the correct position.
5. Press the left ALT + left CTRL keys and at the same time, left click your mouse pointer on one of the Collision Geometry zones on the body and drag that part around to position it.
If you miss clicking on a collision geometry zone, just move the mouse a bit and try again. If you grab a zone, the body will move about depending on how you move the mouse.
6. Once the body is in the position you want, you can unclick the havoc button and turn off Collision Geometry (F4)
You now have a body placed exactly the way you want.