Adding standard items in moldbase definition file

Dear all,

Please help, I am trying to add some standard items to mold base definition file so that each time we can just download the pre-assigned mold base directly from emx. so far I am able to add what ever pre assigned parts, just by saving it ( Save assembly definition to file). but I want to add other standard items which are not preset (example shot counter, limit switch and support pillars).Please advise how this can be done.(we are in process of standardizing the mold assembly so this very important). we are using emx 13.0