Ahh man, that Unlimited Aircraft ammo option also affects many other units aswell, like the mammoth, or the Scrins artillery and, well, almost every single unit ingame, but it's so fun,
now the game's real mayhem!! It affects in the way that all units fire much more rapidly and reload much faster...
WARNING!! When using the inf Aircraft ammo option, you'll notice that units WILL drop like flies on the battlefield. Unless you're using the invincible troops option...
And regarding the 1-Hit-Kill veteran option, is it somehow hard to code? Though I find it already easy to train your troops by just making your units immortal, then making their unit(s) immortal and wait.