I bought this card and got it with about 10 games already on and the seller gave me a cd with even more games on it. She told me to simply drag and drop unzipped games to the disc and play them. when I opened up the SD card to check out the games, they are all in NDS format yet the games I dragged and dropped from the cd are in archived file format. the NDS games play when I load them on to my DS system yet the unzipped files don't. How do I get the unzipped files to convert to NDS format or even to be able to play them?? thoroughly confused. thanks!