I too have the same issue, and also dont care enough to move my console to another room to get these achievements. My room is quite small and I basically have to stand in the closet to play kinect (which I rarely do), but this game my feet can just not get to the positions to hit the keys on the floor. This is only if I cant get the sensor aimed to a magical location where the game actually lets me play and boots up.
Oh well, got 20G outta it before it became impossible to hit some keys. Freebies...