I'm pretty sure windows will devide the program work between the two processors relatively autmaticly, but if you wish to do this manually, open the Task manager, and go to the processes tab. Right click on the task you wish to modify and select "set affinity." It'll give you a list of cores, two if no HT, four if hyperthreading. All are selected so it automaticly selects the "CPU" to use. Uncheck the ones you don't want it to use, by doing this you can set programs to thier own processor.