Karaoke software in flash(repost)

I need a clone of the karaoke player of? [login to view URL] developed with a few key differences. I want support for Ultra star songs,? <[login to view URL]>. I want the possibility to add a video from Youtube as the backdrop of the karaoke playfield. Please describe what technology you would use to implement this. The app should be runnable from a web browser without the need of additional plugins except Flash. Some pointers availible here? <[login to view URL]>