You can up the turns to 1000, as you've already discovered. Aside from that, no. And really, why would you want to play one game that long anyhow?
Well, why the heck not? Interestin' to see just how far ya can go, once in while, huh?
Hey, I just noticed that the first firearms don't have any sound effects... there's the splash of galleons and the rumble of wheels, but when that poor rifleman takes a shot - nothing!
Hmmmmmmm!