Посмотри в папку
SF-Kharkov 1942/data/k42/loc.rus/levels/tech_cfg/m36.engcfg :
нужно быть
m36_01()
{
//object/vehicle type
type = %OT_SPG%;
//mesh (*.go) filename
mesh = m36;
=========================

m36b2()
//with gunbrake
{
//object/vehicle type
type = %OT_SPG%;
//mesh (*.go) filename
mesh = m36_01;
============================
Тожэ в парке matlib.engcfg
должно быть M36B1_Jackson()
{
shader = editor;
textures = m36, m36_bump, mudnburn;
M36B2_Jackson()
{
shader = editor;
textures = m36_01, m36_01_bump, mudnburn;
нужно помощ