Scene preloader?

I followed the basic preloader on the site and it works great. On my site I give the user the option to listen to music or not. I don’t want the nonlisteners to be bogged down with a long load time (if they are using dial-up). Can I alter the code to make it look for the bytes_loaded and total of a scene? Or would it be easier to do it on the same scene, but on a later frame?