Microsoft announced plans today to expand support for Windows XP on budget flash-storage computing devices with an eye towards getting Windows XP running on the OLPC. The software giant will publish design guidelines next year that will make it possible for manufacturers of low-cost mobile devices to build hardware that provides optimal compatibility with Microsoft's legacy operating system. The company also announced plans for field trials next month that will put Windows XP to the test on One Laptop Per Child (OLPC) project's XO laptop.