please problem hair new mesh overwrites default maxis mesh

[lcrmrc]

Hello,

I have tried modify maxis hair long simple mesh to make a new mesh with headband.
Had no problem make the new mesh with milkshape and import it in bodyshop.
... But maxis default hair long simple mesh has been replaced/overwriten in bodyshop by my new mesh.
When i remove the headband mesh in downloads folder, maxis default hair then comes back in the bodyshop, and the new headband mesh of course is absent.

Please, why my new headband mesh overwrites default maxis mesh ? Why new headband mesh is not just in the personnalized custom haircut ?
I would like to have the two haircuts in the game : the default maxis and the new mesh haircut... I dont want to choose one or the other...

I dont understand : i saw no guid to modify in haircut package, like in career package...

Thanks for your help.

[lcrmrc]

i canceled my ask sorry :anime: : i will make headband with mask recolouring :here: will be more simple than hair meshing.