AvoK95 wroteModification is for piracy, I don't think there are many noticeable side effects, most stores charge $30 for the modification. You might be able to mod it yourself,
Note that when you modify the console, you will be vulnerable to get banned, sometimes games include update packages that brick your console if you don't have the latest modification.
Thank you very much, but that's lead me to another questions, there is a chance to get banned if i didn't connect it to the internet ?
and regarding mod, i searched the net and there is a lot of guides and words (GRH, Jtag, Flash, Mod) so it is very confusing, all what i need is to play burned games on it, so any guide for mod is appreciated.