Live TV screen does not fit

[WilPri]

I am using a Panasonic Plasma with WXVGA input connected to my Media Centre box. It is set to standard 16:9 mode and all XP screen output looks good and works well. If I set GB-PVR to full screen mode, it cuts off the bottom part of the screen. I am using an ATI Radeon card and the TV Tuner is a Tul Theater 550. I can not see any place where the aspect ratio can be changed or where I can adjust the screen to at least pad unused areas with black strips.

Does anyone have any advice or ideas on how to fix this.?

[sub]

Due to buggy ATI drivers, you need to edit the direct.ini file and set ForceStandard=16