how do i get .rar files to work?!

Please tel me how to get the .rar n64 roms to work. I've been looking for a pokemon stadium rom and this is the best place but I can't seem to make the .rar files work! PLEASE HELP ME!!!!

You have to extract the files first using WinRar. To read more about why we do this read this page:http://en.wikipedia.org/wiki/Data_compression