[Lo0n]

maybe better option (or simpler to implement) to scale down some of the graphical settings and clear out the windows registry of any unnecessary processes that are going on whilst playing the game. if you are getting stutters then there's too much strain on your system, either from the in-game settings or background processes in windows. know this from experience, had about 60+ processes running and the game played like a slideshow in busy missions, managed to trim it down to around 40, and turn a couple things down in-game, and it ran a lot better. effects = 2 is a major culprit for cutting frames when on ground attack. looks purdy but is a real fps killer, particularly with the view distance mod for smoke n fire.
some mission builders do limit the flak from ships in a bid to make it playable on lower end machines, but there is only so much that cna be done that way before you simply have too little flak around ships.