I have both DVD Calibration discs - Video Essentials and Avia Guide to Home Theatre.
They are extremely useful for setting up large TVs and Projectors. In fact I wouldn't be without them for the latter.
If you are unhappy with the setup of your TV then they are good to have. I personally prefer Avia as a disc for beginners and it has a Subwoofer test which VE does not have.
If you are happy with your TV then you may be better just asking your questions in the TV forum and save the £28
Video Essentials (et al) are essential (sorry) for CRT front & rear projectors as convergeance drifts over time. I tend to run VE every 4 months (but only when MrsH is at work).
------------------ K'ung Fu-tse (The poster fomerly known as PeteH)
Something like these really is a handy thing. I wasn't happy at all with my 32" w/s telly at first. Once I'd run through Video Essentials a few months ago I've been completely happy!
It desperately needed the Brightness and Contrast settings turned down from their defaults.
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Stuart Booth
Somewhere in Buckinghamshire, England, UK