My first time doing a "real" helmet, I hope you like it.
Go to ( C: ) > Program Files > Steam > SteamApps > common > f12013 > characters > bespokehelmets
Back up your original files, then paste the modded helmet in there.
It will replace the gen_01 by default, if you don't want this one to be replaced, just rename it to make it equal to the one you will want.
Any questions, issues or suggestions, just leave it in the disscussion page