I want to be able to stretch the image from one monitor to a second monitor even if i have to use some software to do it.

For example i want the top half of the image that is now shown on my first monitor to occupy the whole second monitor and i want the bottom half to occupy the whole first monitor, or the other way around i don't really care as long as it works. I would be cool to know how to do the same stuff but to the left half and right half.

I know that image pixels would have twice the lenght or height this way but i don't really care about it as long as it works so basically i want the stuff to show on both monitors but with the same pixels as before.

I have a hd4870 and windows7 and hd4000 family doesnt support having two monitors behaving like a large one, only hd5000 upwards, this would solve my problems without any of the drawbacks but it just can't be done (or maybe it can via software but i'm just too tired of searching).

A solution to make almost any graphic card have two monitors behaving like a large one is matrox dualhead2go but that's just as expensive as a good hd5000 card so it's not worth it.

thanks in advance

EDIT

I guess that nobody so far was able to fully comprehend my problem that was very explicitly written but i will elaborate some more.

My hd4870 can have 2 monitors working with it but some stuff like games won't run on both monitors, which sucks.

There are some ways to circumvent this problem and two of them are perfect or almost perfect but expensive and the third would be a software solution that would make it possible.

The first one is to have and hd5000 family video card which will work just fine with both monitors.

The second is to have a matrox dualhead2go that will make my hd4870 detect my two monitors as a large monitor.

The third is to have a software that makes my two displays be detected as a large display and then captures the output of the video card, splits the images and renders them as 2d images to both monitors OR a simpler one but that would make outputted pixels double the width or height would be to capture the output of the graphics card to one screen, split it in two and enlarge it to fit both monitors and then output it to the monitors.

p.s. By capturing the output of the video card i mean just make the video card process the stuff in a certain way. Making the video card detect two monitors as a large one via software may be a bit impossible or impracticable but stretching the output as a 2d image from one to both monitors for some coders should be a walk in the park so it would be likely that such program would exist or that some widespread softwares for dual monitor would have such function in them.