Untitled

import Globals
import os.path

skinsDir = os.path.join(os.path.dirname(__file__), 'skins')
from Products.CMFCore.DirectoryView import registerDirectory
if os.path.isdir(skinsDir):
    registerDirectory(skinsDir, globals())

from AccessControl import Permissions as permissions
from Products.ZenModel.Device import Device
from copy import deepcopy

local_factory = deepcopy(Device.factory_type_information)[0]
tab = { 'id'  : 'perfInterface',
        'name' : 'InterfaceGraphs',
        'action' : 'viewInterfaceGraphs',
        'permissions' : (permissions.view,)
      }

local_factory['actions'] += tuple(tab)

Device.factory_type_information = (local_factory,)