Billious

Hi all, first post so be gentle! Been playing the warlords mod (0.45) for a few weeks now and I get smooth gameplay except when a Torpedo Sphere salvo hits a target. Then I can go and put the kettle on have a cuppa and come back when the explosion dies down and continue with the game Now I can have oodles of different ships on the screen, hammering away at each other without slow downs but the torpedo shere salvo always produces a 1 FPS slide show. I've a fairly good PC A64 3200+ (winchester), 6800GT, 2 GB RAM & Viewsonic VA1912w (widescreen 1440x900 native resolution). Does anyone else have this problem and what setting do I need to reduce to improve this situation (please don't suggest running at a lower res - it just looks crap then). TIA B