Having similar problems with the CVs. The first time I tried clicking on the ship gunner position, CTD. The second time I managed to get into a gun (no option yet, just whatever gun it went to), but when I went back to hangar and clicked on a Spit V (greyed out, just wanted to see what would happen), CTD. Perhaps the CV hangar hasn't been modelled yet, so it crashes trying to show your plane choice?
edit: Sorry, specs in many other threads, but the Cliff Notes version:
Athalon 2600
512 RAM
Radeon 9500 Pro
Win XP Pro
Running 1600x1200x32