1. A method of selecting a compatible processor for addition to a multiprocessor computer, the multiprocessor computer having at least one current processor, the method comprising: receiving identifying information indicative of the identity of each current processor; accessing stored processor compatibility information identifying processors that are compatible with a plurality of processors that includes each of the at least one current processors; executing a computer program comparing the identifying information for each current processor in the multiprocessor computer with the accessed processor compatibility information to determine the processors that are compatible with each current processor; and providing information identifying the processors that are compatible with each current processor.