You got to put copies of the relevant helmet textures in a separate cars folder in GP4 directory. Weird, but this will fix the Bar problem- Gp4 takes the textures for Bar helmets from this folder instead of cars. wad .
I don't know about white Arrows though. I think you must be missing the helmet textures for these entirely. Try reinputing textures with GP4 master or whatever.
Larry
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