Actually, if you're shooting raw, it shouldn't matter. when you shoot in raw capture mode, the camera doesn't actually process the image, it just adds the color balance setting to the file header. It isn't applied 'till you run it through your raw converter. Here's a better explanation...
http://www.luminous-landscape.com/tu...aw-files.shtml
see "saving the raw file", and "reasons to shoot raw"
g