Windows 7/Vista screen flicker on bootcamp and Windows (7/vista) shutdown problem when put to sleep

When I first setup Vista bootcamp and more recently Win 7 bootcamp, I had this annoying problem where the screen flickered for a while before becoming clear. This problem seemed to do something with the video driver, and the driver provided even by the latest bootcamp version (3.1) did not help. The flicker time was minimized when I updated the video driver with what was suggested by Windows Update. However, this introduced another problem, which was that Windows automatically shut down whenever I put the laptop to sleep mode (by pressing the power button or closing the lid) to preserve some power. Fixed this by loading the Snow Leopard CD, accessing the Intel (video) drivers folder, and then executing the driver for Vista version (use this irrespective of the OS installed being Vista or Win 7) for the 965 Chipset. I thought that this might bring back the original flicker problem. Interestingly, however, it did not! The flicker was there occasionally, but disappeared quickly.