My personal taste would be not to have flames on an Enzo it would cheapen it and make it look like some custom hot rod thing (no offence to the custom hot rod boys) an Enzo is pure and should be left that way and painted in a factory Ferrari colour as per the real thing.However this is just my feelings on the matter,if you would like to have flames on the car then that's fine.It's your model so you can paint it your way.If I was to chose a scheme from one of your choices above I think black body/silver flames would be the one I'd go with.