This is for the people who are inquiring about USB method... I actually tried it a while back and its very slow and does not work with brawlex at all. even without brawlex the game will move slowly. So for this pack SD cards only.
i actually tried the usb loader method and it works just fine. to get it to work, you have to put hooktype to axnextframe and ios to 249. otherwise buzzing sound. but you are right about it only working for sd card. usb wouldn't load the brawlex up so im sticking with sd. though i will start searching for a 4gb sd card