Твои действия:
1. Прочитать лицензионное соглашение, особенно п.16 (для MS Win server standart)
16. DOWNGRADE. Instead of creating, storing, and using the software, for each permitted instance you may create, store, and use an earlier version. This agreement applies to your use of the earlier version. If the earlier version includes different components, any terms for those components in the agreement that comes with the earlier version apply to your use of them. Microsoft is not obligated to supply earlier versions to you. At any time, you may replace an earlier version with this version of the software.
2. Прочитать прикрепленную тему этого форума
(FAQ) Правила использования предыдущих версий продуктов (downgrade rights)
3. Что осталось непонятным - спросить на форуме.
