what my idea is, is take the banshee, copy it, change sounds so they are blank, change bitmaps so they are blank, etc. so you have an invisible banshee, call it something like the flyingcamera and put it into the game.
then you would be able to use the original bansee and the flyingcamera (along with the no-hud mod!)
also another idea, is a zooming effect, if this is possible, then you fly up, then you can zoom (if you want to) for close ups, all though this isnt a great idea as the zoom would be so sudden that it would look stupid.
