Yes you can and it's not hard at all.
** BE WARNED THAT YOU SHOULD ONLY DO THIS FOR YOUR OWN PERSONAL COLLECTION. ANY USE OTHER WISE AND IT IS ILLEAGAL!**
In order to play those games though, you will need a device or modchip. These are not illegal to own, BUT are illegal to buy or sell in the US. So with that, I will not tell you where you can buy them, but if you search Google
, I am sure that you can find one.
Some do require soldering skills.
And last but not least, opening your case WILL VOID your warrenty.