[XFree86] regarding Multiple Overlay Planes

Hello ! In Overlay Planes Implementation, 8bit Pseudo Visual is used to Draw on Window (which is transparent to 24 bit TrueColor Image/Window) If there are two OverlayPlanes. (overlay planes are transparent to TrueColor Visual Window, not to each other) in case of multiple overlay planes

[XFree86] mga For Matrox 450

Hello People plz guide me in these two regards 1. Does XFree86 Provide Overlay Implementation ? if Yes then is Accelerated X better for Overlay Implementation or XFree86 2. i have Maxtrox 450, where can i get the Updated mga DRIVER because default does't support Matrox 450 Thanking in