KaraFun karaoke

[fortunateizzi]

Ok, I figured out how to record my voice as a separate WAV file. But how do I save a file with the karaoke background music with my voice?

I followed all the instructions on the help page, but I still don't get it. I tried converting the wav file, converting the karaoke... but it won't let me because it says I need KaraFun Studio. Can someone tell me exactly step by step what to do?