How do I enter new contact from "New Case" form using a contact subtype?
Yes you can.


Go to Administer -> Customize Data &amp; Screens -> Profiles
Click to the "Reserved Profiles" tab
Find the "New Individual" profile and click "Fields" then "Add Field"
Field type "Contact" field name "Contact SubType"
Save the field with whatever label, help text, etc. you wish.


You will then be able to specify the contact sub-type on any New Individual popup form.

Note: I just tested this and the resulting field uses a rather ugly multiselect widget. I've just posted a fix for this which will get into the next release.