noob asking an easy question for you guys

Hello,
Im 100% new here, just signed up, I got a r4 for my DS, and im trying to figure out how to download games to add to it, i went to the ROM section and downladed a few to try it on my own, but it downloads as a .rar file, where the games that are on my card are .nds files.so i know that im doing something completly stupid, but can you tell me what?thanks again, i havent figured out the searc on this forum yet or i would have done that without askingthanks

Your right you are doing something completely stupid!.............I kid, I kidThe .rar files are archived (zipped) files so that they are smaller for upload or download.Download winrar (google search for it, it's free) and then extract the .nds files from these archives and your good to go.