Its not hard. All you have to do is import the pods assets into unity. Place the ladder and airlocks and export. Then just config edit the scale you wish it to be and use the stock IVA. Nothing to it.
Since I have decided to work on this mod again, I have recreated my release thread. http://kerbalspaceprogram.com/project-excalibur-a-soyuz-inspired-command-pod-set-v-1/
True, and motion is relative to the point of observation. As in we are moving at over a 1000 mph because of the rotation of the earth. The user below me can explain the theory of general relativity better then I can.