Stax, would you mind giving a few details on Valenka, bodyguard to Le Chiffre played by Ivana Milicevic? What special talents does she have that make her a suitable hench? Martial arts? Weapons? Does she have a fight scene with Bond, or a love scene, or both, or neither? Is she involved in torturing 007? Is her relationship with Le Chiffre purely professional?
So, if understand well, we have:
First: Pre Credits Sequence
Second: The GunBarrel sequence
Third: the credits/theme song sequence, and then the movie.
is that, the order, Stax?
I Like it.
the pre-credits sequence before the gunbarrel gives it a real cool touch, it will leave people surprised and shocked for moments, and then at the end of the sequence we have the GREAT gunbarrel sequence and we see the relief on their faces. great! 
Given the piece of music with which the gunbarrel
must be accompanied, it seems likely that the opening credits of CASINO ROYALE will feature an instrumental track, presumably starting off with a version of The James Bond Theme that serves as the intro into something new penned by Arnold (in collaboration again with Propellerheads, hopefully). It just seems harder to imagine seeing the gunbarrel, hearing The James Bond Theme, and then going right into "Casino Royale" or "A Whisper of Love, A Whisper of Hate", or some new song by George Michael or some other Sony artist. That's possible, though, obviously - just harder to imagine, for some reason.
This is assuming that the gunbarrel will kick off the opening credits, obviously.