Open Ps3 .dat files

[Smakkohooves]

I recently have worked for the first time on a ps3 game, so, i have open it deep until inside the psarc and the final result Is a lot of .dat files.
Now im'blocked. how i can open these files?
I have to convertit it? Changing the format?
I attach a screen here, is few of that files,
the first i want open.