Helmets caps modding

Like the uniforms i understand that you have to take one model copy it paste rename it to model you want replace but so far I don't understand how to do it with helmets kickitem and etc i took helmet copy paste rename it then in hex editor i found the kick item line from helmet i want to replace copy and replace the new model kickitem but in game i still no see helmet when i grab it on head my question how to do it right If you can help thank you tried swap beetween helmete alone for 3 4 years no success lol ,only uniforms

Good idea.

If you're trying to import the Prussian WW1 helmet...



... then I want the French WW1 helmet