Cant get game that i just downloaded to work

Sorry to sound like a newbie but i downloaded a game off of here and i forgot how to be able to play it on my TTDS. If someone could please refresh my memory on what i need to do after i download it I would be very grateful.

If your using rinrar you should
right click
extract hereThen get the .nds file

Open up the file, extract the nds file to your micro sd card, and your done. make sure you have winrar and firmware first on your dstt