Go to driver3d.ini and do the followingthis is for the normal driver model, other may vary)
[MODEL]
NAME=driver
This is the important part: [HIDE_OBJECT_0]
NAME=DRIVER:HELMET
[HIDE_OBJECT_1]
NAME=DRIVERriver_Body_SUB0
[HIDE_OBJECT_2]
NAME=DRIVER:GEO_Driver_FACE