Well....
This is blasphemy. Pure and simple. Also, I'm pretty sure...whether remixed or not...you are violating NG rules by using REAL samples. Unless of course you have permission from METALLICA to do this.
That aside, you did a good job with remixing it and all that jazz that goes with remixing. I'm not going to vote on this, cause I want to zero it soooo bad, just for doing this to a great song.
An idea for keeping to NG rules, would maybe Download a midi version of this song, or the Guitar Pro version of it, import the midi into FL, and use all of FL's resources for the music (including metallicas part). Then you can manipulate the hell out of it.
Anyways.