A little bit too complicated to answer on here - do a search for 'lag problems on Guitar Hero' and you'll find several useful articles that walk you through the calibration of games like this....
No, HD cables will not decrease the lag. In fact, if you increase the video output from 720p to 1080p, more data is sent to your TV causing additional lag. There is no need to buy expensive HDMI cables either unless you have to connect your console from more than 15 meters away from your TV.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.