program for backgrounds:
http://www.mediafire.com/download/qvb0c267k610zmk/BGs.rar

music tutorial:
https://www.youtube.com/watch?v=l_ztC9KgMkw

an alternative to converting the BGM yourself is to download it here:
http://www.smwcentral.net/?p=section&s=sm64music

some tool i made, which enables you to have an intro to your BGM:
https://www.youtube.com/watch?v=P-6hF6rys04