1) Find you PS3 Model#...eg CECH....
2) Check it by this list:
That link you provided of the PS3 is a little confusing. I doubt they still have the 160GB PHAT PS3, I could be wrong though. Either way, if you click the link I provided you'll see you have an array of PS3's with the 160GB HDD. Chances are it will be 3000 Model PS3 which is unhackable.