Miscellaneous Files in Project Hierarchy

hi,, eveybody

            Well, i hava a new problem, can anyone help me?

    I have a VSPackage , a Project VSPackage that was build following the Project Package of IronPython when i use this VSPackage to a open a .MyCustomFile it opens but it doesnt create any folder like Miscellaneous Files, but when i use this VSPackage in an ISOLATED SHELL project it creates an Miscellaneours Files folder. 
    How can disable that creation of Miscellaneous Files Folder, i see the same performance in Iron python isolated.
    Any idea

thanks a lot

Jherzon