Ok i installed the css and the name icons and they show up for my clone but when i start a match with the character the game crashes.So what do i do to fix this?

Ok so i just got a sd 16 gb sandisk SDHC card.And i tried to use texture hacks for my copy of brawl but they won't work! But earlier i saw a post online that said that you can only use a SD card and that has 2gbs or less.So i just want  if that is true or not?