Numchuk...sorry but you'll never make a V6 sound like that. As SIXJAK has said, you can make em so that the average person would probably mistake it for a V8 at idle and lower RPMs, but once you get on it the V6 scream will always come through.
The two in my sticky thread I think of first off that sound most like the V8 video you posted are:
and this car:
There are many others that sound really great though as well. The ones above would probably be a bit much for me.