It's done exactly like the BCS Standings, just with a few different polls.
The BCS Standings are done thusly:
(Harris Poll Points/Total Potential Harris Poll Points) + (USA Today Poll Points/Total Potential USA Today Poll Points)
Then, for the computers, the best and worst rankings are removed from each team, and each team is given an inverse point score for each position in the ranking, so 1st = 25, 2nd = 24...25th = 1 point. So the highest possible total there is 100 for the four scores out of 6.
So it becomes the first line + (Total Computer Points/100). Add that together, and divide by 3 and you get each team's BCS Score. Only difference is that the BCS uses the Harris Poll, USA Today Poll, and the computers are Peter Wolfe, Kenneth Massey, Colley Matrix, Jeff Sagarin, Anderson & Hester, and Richard Billingsley - mine uses the USA Today Poll, the AP Poll, and the computers I use are Kenneth Massey, Colley Matrix, Jeff Sagarin, Sonny Moore, Compughter, and Entropy.
I have been dabbling in trying to make my own computer ranking system, but it requires some immense mathematical skill, which I don't really have.
