Hello DAMON96.
And easy to install.
On the way Grandprix 4/carsets/1988/data/hetmet, make a copy of the box Helmet.
Paste the folder Helmet elsewhere.
Delete the folder directory 1988/data/Helmet Helmet.
Using the CSM install the new helmets or with a double-tap the file.
Close the CSM.
Open Windows Explorer, Grandprix 4/carsets/1988/data/hetmet, you'll see four files.
xlol, xstd, xhi and xshape.
Delete the "x". It is thus:
lol, std, hi and shape.
Open the CSM and see if that's OK.
Célio Jr. - Rio Verde - Goiás - Brasil