Create a Studio account
To create a CamModelDirectory Studio account, press here.
Add models
After you created and verified your Studio account, you can add your models, by going to Studio ⇒ Add model.
If the model already has an account, she can add her account under your studio by going to Settings ⇒ Account ⇒ Add me under studio.
There, she will have to introduce the Skype ID of your account studio or your Studio's username, and she will be added. Don't forget to press Save afterwards!