Salut ,
regarde les modifications.
Le problême vient surement du hiddenselection incomplet. 
class CfgPatches
{
	class Opex_Balaclava
        {
		units[] = {OPEX_BALACLAVA_W};
		weapons[] = {};
		requiredVersion = 0.1;
		requiredAddons[] = {};
	};
};
class CfgGlasses 
{ 
	class None;                                                                               // External class reference
	class OPEX_BALACLAVA_W : None
        {
		scope = 2;                                                                        // visible editeur
		scopeCurator = 2;						                  // visible editeur zeus.
		scopeArsenal = 2;						                  // visible editeur Arsenal.
		author = "Paul";                                                                  // auteur
		displayName = "Opex Balaclava Woodland";                                          // nom de objet
		model = "\A3\Characters_F_Bootcamp\Guerrilla\g_balaclava_clean.p3d";              // Model 3D
		picture = "\A3\Characters_F_Bootcamp\Data\UI\icon_G_Balaclava_clean_ca.paa";      // image inventaire.
		hiddenSelections[] = {"camo"};                                                    // cache la selection sur le model 3D
		hiddenSelectionsTextures[] = {"\opex_balaclava\Data\balaclava_woodland.paa"};     // Affiche la nouvelle textue de la selection
		identityTypes[] = {};                                                             // greffe ta cagoule à  une identité.
		mass = 2;                                                                         // Poids de la cagoule: de 'objet.
	};
};
l 
exemple: 
identityTypes[] = 
{"NoGlasses",0,"G_NATO_default",0,"G_NATO_casual",0,"G_NATO_pilot",0,"G_NATO_recon",0,"G_NATO_SF",0,"G_NATO_sniper",0,"G_NATO_diver",0,"G_IRAN_default",0,"G_IRAN_diver",0,"G_GUERIL_default",0,"G_HAF_default",0,"G_CIVIL_female",40,"G_CIVIL_male",0};