The RRO has been an option for ages (years?) in both DirectX Properties (cpl) and Diagnostic Tool (Run -> dxdiag -> More Help tab). ATI added this option to a third place in their Control Panel (Displays tab -> Monitor) some time last year. Since February it has also functioned as an OpenGL RRO although the label refers only to DirectX. So, if you run a Radeon, no external programs are requir'd.