I would hate to bump this old thread up, but I've just figured out how to adjust the height to fit in any JR ES44. 
 Just clone whatever ES44 Tier 4 cab and put these in its config file:
cameralist
{
  camera0                               -0.564,0.984,0.987,13.528,-0.137
  camera1                               0.707,-0.333,1.023,-6.189,-0.049
  camera2                               1.317,0.949,1.023,-13.501,-0.122
  camera3                               -1.058,0.522,0.887,0.1,-0.089
  camera4                               -1.382,0.78,0.987,6.592,-0.194
  camera5                               -1.361,0.923,1.137,6.902,-0.503
  camera6                               -0.618,0.715,1.023,-0.983,-0.234
}
mesh-table
{
  default
  {
    mesh                                "Interior_ES44AC_Tier_4_DES.im"
    auto-create                         1
    position                            0,7.5,-3.1
  }
This did pretty well when I tested the NS Tier 4 cab in my JR ES44AC's and you can tell me if this method works for you.