the files you want to upload -mp3 in your case- have first to be packed into rar-files
there are more programs to do so, bur rapidshare won't do it for you.
so you need a program to pack the mp's.
if you want rar-files, there are more fine programs, i prefer winrar.
it's a trial, but keeps working forever.
you can get it
hereps: these are no stupid questions! just asking how things work is okay with me.