There is no universal solution or advice for using an unsupported PCI board with Real-Time Windows Target. If you need an advice for a specific type of board, please post more details about the board - at minimum, its manufacturer, type and functionality.
Generally, writing a driver for an unsupported board is an advanced task that can get very difficult for complex boards. Very detailed knowledge of the board, including register layout and low-level programming, is required. Unless the board can do something that no supported board can, it is usually best to stay with boards that are supported.
