Footstep volume tweak might change that feeling of hearing yourself walking around where you perceive yourself to be moving, causing you to think somebody is on the other side of the wall / behind you.
Yeah Ill probably pick it up next time its on sale. If you'd like to experiment with setting up a new server on my box just let me know. I can give you vpn access so that you can just play around with it. What kind of OS would you prefer? Windows 2012? Linux? (If so what distro?)