I bought some carpet for my back riser I had built for my home theater last year. How does one go about carpeting the thing. Should I use carpet nails or a staple gun?

Hello. I am finishing up my room which is an old bedroom in the basement. I will carpet for sure but wanted to get something with a little character. However, I can not find much HT carpeting out there:wits-end: The few sites I found have very limited choices. I am not looking for...