I just tried warpoverlay-20051025.zip. Like Gabriele, I also have an ATI X800. WarpOverlay loads (the PCI ID is in the supported chipsets list), but it doesn't actually work. With WVGUI, I just get a black window (or black screen). DP.EXE thinks it's running, but there's nothing on screen. Valery's old WO_DEMO fails with "Can't set up overlay! Incorrect parameter passed!"