opengl.cpp
find this: Code:
void APIENTRY pglBegin

somewhere in body add following:
Code:
if(cvar.weaponsmoke && me.alive)
    {
      cl_entity_t *curent;
      curent = pstudio->GetCurrentEntity();
      curent->curstate.rendercolor.r = cvar.wsmoker;
      curent->curstate.rendercolor.g = cvar.wsmokeg;
      curent->curstate.rendercolor.b = cvar.wsmokeb;
      glBlendFunc(GL_FRONT_AND_BACK, GL_FILL);
    }

cvar.cpp Code:
REGISTER_CVAR_INT( wsmoker, 0)
REGISTER_CVAR_INT( wsmokeg, 0)
REGISTER_CVAR_INT( wsmokeb, 255)
REGISTER_CVAR_INT( weaponsmoke, 0)


cvar.h Code:
int wsmoker;
int wsmokeg;
int wsmokeb;
int weaponsmoke;