Use of Shot Put Pro on Mac Book Pro -- how many processors to specify?

I am using a newly purchases Panasonic HPX250 and finding it superb for my uses. I have received invaluable help with downloading on another thread in this forum.

I now have a question about P2 cards and Shot Put Pro.

I have purchased Shot Put Pro, as suggested in an earlier posting series, and it is speedy and comprehensive -- if not intuitive. The User Manual is the poster child for spare documentation.

I am using a MacBookPro 15" from May, 2010 with the, then, new i7 chip. There is this about the machine:

"The Core i5 and i7 processors have a few interesting performance features, including Hyper-Threading, which uses virtual cores to double the amount of processing cores presented to the operating system. The processors have dual cores, but OS X treats them as having four cores. Another i5/i7 technology, Turbo Boost, allows the processor to speed up for a short period of time when necessary, or shut down unused cores and give the resources to the cores in use. Turbo Boost can increase the clock speed of the 2.4GHz Core i5 processor up to 2.93GHz, for example."

What I would like to know is where to set the concurrent processing counter in SPP. Do I set it for 2 processors or 4?

Many thanks.

Best regards, Bill