Active Directory.

In active Directory currently if you create a user using a code and define user private drive and location in Terminal Service, the folder get created when the user logs on the first time. If you also define the users logon script , the [login to view URL] will execute after the folder has been created. What I would like to do is disable the property of creating a user folder sine its define in the Terminal Service Profile and then when [login to view URL] script execute it will create the folder and set permission as required. How can the creation of the folder be disabled if the Terminal Service Profile is defined on ?