Структура таблицы:
ID | itemid | typeid | skinid | modelid | index | pos






#define MAX_CUSTOM_SKINS        140
#define MAX_SKIN_ATTACH_TYPES   1000
new CustomSkinAccessIndex[MAX_CUSTOM_SKINS][MAX_SKIN_ATTACH_TYPES] = { { -1, -1, ... }, ... };
new Float: CustomSkinAccessPos[MAX_CUSTOM_SKINS][MAX_SKIN_ATTACH_TYPES][9];



// LoadCustomAccessPos
for(new i = 0; i < rows; i++) {
    new itemid = result[itemid];
    new typeid = result[typeid];
    new skinid = result[skinid];
    new modelid = result[modelid];
    new index = result[index];
    new pos[9] = result[pos];

    if(!(0 <= itemid < sizeof(ITEM_INFO))) continue;
    if(!(0 <= typeid < MAX_SKIN_ATTACH_TYPES)) continue;
    if(!(312 <= skinid < 312+MAX_CUSTOM_SKINS)) continue;

    new skin_array = skinid-312;
    CustomSkinAccessIndex[skin_array][typeid] = index;

    CustomSkinAccessPos[skin_array][typeid][0] = pos[0];
    CustomSkinAccessPos[skin_array][typeid][1] = pos[1];
    CustomSkinAccessPos[skin_array][typeid][2] = pos[2];

    CustomSkinAccessPos[skin_array][typeid][3] = pos[3];
    CustomSkinAccessPos[skin_array][typeid][4] = pos[4];
    CustomSkinAccessPos[skin_array][typeid][5] = pos[5];

    CustomSkinAccessPos[skin_array][typeid][6] = pos[6];
    CustomSkinAccessPos[skin_array][typeid][7] = pos[7];
    CustomSkinAccessPos[skin_array][typeid][8] = pos[8];
}





stock SetAttachToSkin(playerid, type, model, index, materialcolor1 = 0xFFFFFFFF, materialcolor2 = 0xFFFFFFFF, bool:attempt = false)
{
    new skinid = pData[playerid][SKIN];

    if(IsCustomSkin(skinid)) {

        new skin_array = skinid-312;
        if(!(0 <= skin_array < MAX_CUSTOM_SKINS)) return false;

        if(CustomSkinAccessIndex[skin_array][typeid] != -1) {
            return SetPlayerAttachedObject(playerid, index, model,
                CustomSkinAccessIndex[skin_array][typeid],
                CustomSkinAccessPos[skin_array][typeid][0], CustomSkinAccessPos[skin_array][typeid][1], CustomSkinAccessPos[skin_array][typeid][2],
                CustomSkinAccessPos[skin_array][typeid][3], CustomSkinAccessPos[skin_array][typeid][4], CustomSkinAccessPos[skin_array][typeid][5],
                CustomSkinAccessPos[skin_array][typeid][6], CustomSkinAccessPos[skin_array][typeid][7], CustomSkinAccessPos[skin_array][typeid][8],
                materialcolor1, materialcolor2, attempt);
        }

        return false;
    }


// ниже остальные аттачи на стоковые скины

    if(type == 1) {

    }
    else if(type == 2) {

    }

    return false;
}