I have this game too, but for Windows. I think the PC version is better, because you can mod the game and change things.
The game was actually rushed to completion, and several buildings (Dinovet, Stadium, JPI, Gate, Hunting Platform, to name a few) and dinosaurs were scrapped. Evidence remains of them in the game files, you can check wikipedia and see. There are various sites you can go to to edit the game, (I have my game so you can unlock all 9 sites, there is no limit on how many dinosaurs you may have in a park, and I've added a few new buildings and things by tampering with the codes. I remember how to do some things, and I'd be glad to assist you where I can).
Remember, this is only for the PC version. And if you go to those sites to find out how to do these, remember this.
1: You can't add new models to the game (They haven't figured out how yet. And they have tried everything)
2: Search before posting. (The search function is dodgy, but do try first)
3: BACK UP YOUR FILES! (Make a backup of anything you change, so if the game stops working, you can put it back to normal without re-installing!)
I have seen so many people ask the same dumb question or claim they know how to add models, and it just annoys the mods. So don't do that, and you'll be popular!