I've been getting emails about VS2005 from MSDN media kits asking for a Product Key during installation.  These products are preconfigured with the product key associated with your MSDN subscription.  However, if a previous version of VS 2005 (trial or beta) is currently installed on a desktop, a product key will be prompted for. If this previous version is removed, the install of the full VS 2005 version will be successful without prompting for a product key.

- Jeff O.