just skip to Jak 3, its the best one. Jak II is the worst game naughty dog has made since their pre-Crash Bandicoot era
I find it funny that I always preferred Jak 3, but the hardcore fans always would claim Jak 2 was the much better game.
Though I've grown to appreciate both of them. I do appreciate the difficulty of Jak 2. After I've played both of them multiple times, its a welcome challenge.