Hello,
I think you may be confused about your WinCustomize subscription and not something you need to install or activate.
The WinCustomize subscription allows access to a collection of "skins", 'dreams', and 'packages' that requires certain programs to run or implement them. For example, WindowBlinds skins require WindowBlinds, Dreams require DeskScapes, icon packages require IconPackager, and so forth.
These applications are part of Object Desktop (but can be purchased individually). The current list of the applications in Object Desktop can be found at http://www.stardock.com/products/odnt/information.asp
WinCustomize subscriptions comes with the features listed at http://www.wincustomize.com/subscribers.aspx?info
While you may download skins from WinCustomize without limits, you will need the appropriate programs to run the software.
That all said, you do not have a Wincustomize sub under the account you are posting under. If you did purchase a WC sub, please create a ticket here with the email address you used to purchase it:
http://esupport.stardock.com/index.php?/Tickets/Submit
Sean Drohan
Stardock Support Manager