the only one of those worth mentioning is s4.
i'm not talking about piracy or anything like that, i'm talking about modifying a console to run unsigned code. hundreds, maybe thousands of websites cover the hacking and modification of consoles dating back to the nes, maybe even before(coleco mods anyone?). there is nothing wrong with modifying consoles for yourself or for someone else for free. as much as the manufacturers don't like it, they can't do anything if there's no exchange of money for modified hardware.
besides, don't use words like "try." the wii has been hacked so far the you can install homebrew by putting a file on your sd card and running that file on the wii. BOOM, you've got the homebrew channel in your wii system menu and you can run all your homebrew from there. it's easy, fun, and hey, free games!