The best thing you can do is ... don't try. It will be a massive waste of effort. Even stealing computing time and racking up a massive power bill for someone else will only net you a few pennies worth of Bitcoins. It is a good way to turn a thousand dollars in electricity into a buck worth of bitcoins.
Why do you this. Surely it would mine a fair amount given the amount of processors?
More thank 0.5 Btc a month?