When i'm playing the game it sometimes begin to lag but is that big lags that makes you wait a few seconds(it usually happens when i'm going to play with the Voyager it takes years to load it) i want to fix this i use KM mod in the game the version is the 2009.12.So what should i do?
How big are the textures for the Voyager and what are your system specs?
look i don't know the size of the voyager but my pc have a Nvidia Geforce i think that is 266 i don't know but it is with AGP or AGX something like that the other things like memory and the processor are above the asked i have tested this things but on the part of the video card i'm not good.
You can't rely on BC requirements. Most mods today use high poly models and hires textures unlike the original BC models. As a result older systems might struggle. Try to get your complete system specs. Dxdiag or Everest can assist you with that.
Sometimes it also helps resizing the textures with XnView. XnView Software - Free graphic and photo viewer, converter, organizer Note that BC only accepts textures that are a power of 2 like 512x512 or 256x128.