Windows 7 - Is there any way to resize the height of my monitor digitally

So i just set up a tri screen but my main monitor is a little bit taller than my side screens is there any way to get some kind of black bars to resize the height of my main monitor to the other ones i have?
main monitor is 1920 x 180
side monitors are 1280 x 1024

I didnt really know what section to post this in so i just did this one first
I have the Ati readeon hd 5770

Im trying to change the apect ratio of one of my screens of my tri screen setup but i cant get there.

Heres where i go to get the area where i get the area
open ccc / my digital flat-panels / properties (digital flat-panel) / Image scaling
when i go to image scaling and either check or un-check enable gpu scaling everything underneath will stay gray and unchangeable all that stays checked is "scale image to full panel size" i cant check "maintain apect ratio"