Hi, when I started original galciv2 or the Dark Avatar, it worked smoothly, but Twilight was running very slowly when a ship was on screen. I tried to disable everything in the performance settings, but it was even worst. After some time I figured out, that the only way when the game runs smoothly is when I have "Allow mixed vertex processing mode" ON and "Use enhanced ship rendering" OFF. These features aren't documented in the manual and aren't set how I described by default. My system is notebook with dual core 1.7 GHz, 2.5GB RAM and Intel GMA965 integrated graphics