In duststorm.cs, the line
uiName = "Duststorm";
Needs to be changed to uiName = "";
Other wise when the map is loaded, an emitter is available from the wrench menu that one by itself effectively cripples the frame rate. On ace's server someone spawned this and I turned all my setting to the lowest just to kill the brick owning it, and I still was lagging horribly.