Single Monitor act exactly like dual monitor?

Does anyone know if there is a way to make a single monitor act like a dual monitor with 2 totally seperated areas that are detected at the window's level.

Eg. 2560x1600 monitor to show up as 2 panels with 1280x1600 resolution each or a 1920x1200 showing up as 2 960x1200 monitors. I am usually looking at code/documents mostly so larger vertical vs horizontal resoutions are preferred.

Is there any video card drivers that support this or is there some layer to put over windows to allow for this functionality. The solution should make windows see 2 monitors when looking at the display settings. There should be no difference from a real 2 monitor solution.

Is this even possible?

Edit: Using windows Vista.

Edit 2: I am looking for something that virtualizes the multiple monitors so windows itself thinks there is 2 monitors. Not looking for something that will give me split bars etc.

Try WinSplit Revolution.

Edit: Since you want Windows to think there are two physical monitors, maybe Matrox PowerDesk or Virtual Display Manager would fit your needs.

How about we just solve your original problem?

Are you using windows 7? You can drag the window title bar to the left or right edge to use up half the screen.

For XP/Vista try this http://www.tech-recipes.com/rx/188/xp_vista_tile_cascade_minimize_windows/