If you can't see where the motherboard is written, then you don't have a TA-082. so you're safe. But don't go buying GTA:LCS at a retail tore, because they all sell the patched version (which will not work with the downgrader). So what I am suggesting, is either borrow the game from a friend who you know bought GTA:LCS around the time when it was released or you can rent from a store and hopefully that will work with the downgrader; and if it doesn't, then at least you can have some fun
