First one is possible but it would be best to see the hood installed. I'm think maybe a lighter shade would go better with the DSG paint. Maybe a dark gray?
I think the flames look cool. It isn't overly tacky. I would personally like to see it in person to get a real look at them. Anything done to stand out is cool as long as its not all ricey looking.
I kind of like the idea of satin black stripes in that area for my car because it is already black, so it would be a subtle detail, I don't think I would like them on any other color, though. The flames might be cool for the same reason, since they would be like ghost flames on a black car anyway. I just fell in love with the satin black stripes on a black car after seeing a black GT500KR in a local showroom. Have been trying to think of a subtle way to incorporate that look on my car ever since, and these stripes might work for that. I was actually considering those triangle ones you offer for the sides of the cutouts for this reason.