The New Record Type Wizard creates a new account of a specific Record Type using custom buttons on the Account Detail page. Admins can decide to remove a user's ability to create a new account using the custom button without removing that button from the page layout or by removing create permissions from the Account, Child Account, and Address objects. However, the user is still able to create new accounts.
S-Controls are known not to handle profile or permission set based security controls properly. In this case, the S-Control bypasses permissions and creates new records on the objects.
Consider reaching out to Professional Services for help with creating a VisualForce page instead.
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