Ref the Eon approval, that is an interesting question.
Don't know if you read the interview I did with the Sky chap who put together the Sky HD 007 channel car chase advert, but certainly the visuals were not to be tampered with in any way. That said, they were forced to completely re-record the sound due to the way the original sound was laid to track but the finished product was probably indiscernible to the common ear from the original sound.
Yeah, that's exactly what made me think of that- they don't seem keen on people tinkering with their stuff.
That said: it was much more impressive without the whistle! I think they also sped it up to remove the slo-mo effect too.