Full Screen applications + 40" widescreen problems

First Sorry if this is in the wrong section and thanks for taking the time to help me out, if atall possible, I brought a new Samsung 40" LCD to play battlefield / world of warcraft / moviews etc etc movies work fine as far as i can tell theres no or very little screen loss, however I am missing about 1cm arround the whole border of the actual game , so with w.o.w. i can just only see the very top of my spells and with battlefield i cant see again 1cm arround the edge, this is also the case with black and white 2 and every game actualy. anyone had the same probl,e and got it sorted out ?

someone said once something about changing value to edit a new resolution from the main exe . using a string but god knows

athlon 2.4ghz , 1gb ram [ddr-pc2700]
BFG Nvidia 7800 GS [XfX Gear] DVI to HDMI Connection
res 1176 x 664 this dont seem to matter when on full screen , so it seems .

literly any suggestions or a link to any infomation would be apprichated.. thanks