Try this wiki article on dead pixels: http://www.wikihow.com/Fix-a-Stuck-Pixel-on-an-LCD-Monitor
As for the warm/cool/neutral... warm means that all whites will be tinted red/orange, cool means whites are tinted blue and neutral means whites are white.
Backlight, I don't know about your screen, but on my samsung, there's a noticable difference in the different levels. You might want to play around with your screens brightness and contrast levels and see how they are affected by the backlight strength. I have my backlight turned down to 70% because I found that it produced an image that was way too bright and distracting as wells over emphisizing greens (pan's labrynth looked particularly bad, the greens were almost neon)
DVD and SD signals on HD screens. A general tip is turn down your sharpening setting. If your sharpening is set high, it increases the appearence of jaggies, pixelation as well making color gradations seems more harsh. As for DVDs, there are players that have a feature called upscaling. Basically it provides a 1080i signal from your DVD... it's not going to look as nice as a native HD source, but it should help give you a cleaner picture.
If you haven't already, try searching sites like cnet to see if they reviewed your screen, often the writer or other users will post tips on setting up the screen.