This thread is here to post general solutions and links to programs on getting Windows games working on multiple processor systems.

settaffin
http://www.hayseed.net/~emerson/

A tiny wrapper program that will start itself, set its CPU affinity, then spawn another program specified on the command line, which will inherit this affinity.

Source and Binary
http://www.hayseed.net/~emerson/setaffin-0_1.zip