Hi
guys I`ve got a Nvidia Card with actual nvidia Drivers Debian Lenny amd64 running
with resolution 1920x1080 some how known as FullHD resolution.

Well everything works well also the gnome gui starts, but the problem is, I need to scale the screen a little bit smaller because on my connected Monitor through HDMI (Panasonic TH46PZ80E, 46" Plasma Full HD Display) I cannot see the gnome tray as the application tab on the downside. The screen is on every side about 5mm to large.
I`m quite okay with Linux but this is the first time that i did something with 16:9 and so high resolution. please help me out or ask for more detailed information.

ps.On inet i read something with modelines but i have no idea of them.