One of the best utilities for setting up the picture is contained in the Terminator 2 DVD.
If you have it, use Disc 0.01 and from the main menu, select sensory control, highlight the THX icon on the Terminator's head and you will be taken into Lucasfilm THX Optimiser. Select Video Tests and the fourth one in the sequence (you have to go through the first three) is a test grid which includes a sharpness scale and colour bar.
If you have this on your TV screen you can alter the geometry con no problemo!
Hasta la vista!