hi Terry
The THX mode is quite easy. do the front panel controls in the user menu, then enter the service mode to do the gray scale. This is the cinema mode setting (warm 2). Remeasure out of the service mode to ensure they are the same.
You need Calman or ControlCal to access and label the ISF modes on the VT50. Keep in mind that it is just a relabelling of the Pro mode.
