A cheaper, but less comprehensive alternative to the setup discs is to load up a THX DVD. All of them have a setup screen that lets you make some rudimentary adjustments especially for contrast and black level. You apparently need special glasses to get the colors right.
Some THX mastered DVDs (what I already had) Highlander, Hellraiser I & II, Akira and Fight Club.
Look at the bottom of the spine of your DVDs for the THX logo.