Anyone is free to try these as INTERIM user menu settings prior to doing them themselves or getting an ISF calibration, but they may or may not work on your particular TH-42PX80U Plasma:

Input format: HDMI

Mode: Cinema
Picture: 42(range 0-100)
Bright: 55
Color: 34
Tint: -2(red)
Sharp: 32
Color Temp: "Low"
Digital NR, other sweeteners: Off/disabled.

Digital Video Essentials '03

The friends I did this for were impressed with the realism yielded by this "surface" calibration.