What model Panasonic Plasma do you have? Is it the 30, 50, or 60 series?
Could you post settings? I have a TC-P60VT60 which has a ton of customization options but I've also owned an P55ST30 which had much less options. Don't think the lower end 30 series had white point balance sliders.
Panasonic VIERA TC-P50GT25. The options aren't massive, probably more in line with your ST30.
I can post the settings tonight if you'd like (although all rooms are slightly different). Just let me know and I'll give it a shot.