hi sorry if this post is in the wrong forum?

i need help. im trying to burn a movie to cd(so i cant watch it on my dvd player downstairs) useing nero6 it told me that it doesnt suport the file type (avi) my friend told me i need to convert the file into a mpeg? then burn it in nero?

how do i convert this file? what program do i need and where do i get if from? many thanks