pc & ps3 account registration help

Hello and thanks for taking a minute to read.

I unfortunately broke the screen on my laptop and am at the mercy of Lenovo as to how long it'll be until I get it back, so I was wondering how to link a ps3 version of the game to my account while my pc is in the repair shop.

I know I have to get a 2nd registration code by purchasing a 2nd copy of the game. This is not the issue. I just don't know where to begin!

My sister already has a ps3 copy and plays semi-regularly. Will it cause issues if i try to buy a 2nd digital copy of the same game we already bought so that I can register a ps3 version of the game to my account? I realize this may be more of a playstation forum question...

Also, where do I go to register my ps3 version? Lodestone? SE home site? I don't even know where to go to PAY these people once I need to pay my subscription!!!

Sorry if my information is a bit jumbled, as I'm not sure what info is needed. Thanks for reading. I just don't want to not be able to play for however long it takes to get my computer fixed!!!

P.S. I must say that this is all quite unnecesarily convoluted! Why doesn't SE just offer a universal client and just grant access based on subscription like WoW does???

I could go on and on, but really I just want to get back to Eorzea. please help!! thanks again!

P.S.S. if your post goes on to read something along the lines of "ermergerd uz sterpid & needz 2 lern 2 internetz" please move along.

I got the PSN version and I all had to do was start up the game and log into my account and it registered it by itself no code needed. Also both you and you sister can play on one PS3 cause the codes are registered to your account and not the system. As for the PS3 hard copy that does work differently and not sure if that registered on the site or through the console like on the PC.