Hey guys! Is it safe to buy two Acekard 2i flashcards for the kids? The point is that I heard there can be some troubles if you use two Acekards and want to play multiplayer games. It seems that Acekard 2i can better work with some other flashcards in multiplayer mode. Is it true? Do you have experience using two Acekard's 2i on two different DSi handhelds while playing multiplayer games? Thanks in advance..