You'll get a lot more people viewing your question if you were to open a new thread. The only people likely to see this are the ones who have posted or subscribed to this thread.

But, to answer your question, no. You can't. There are structural changes in how the data is stored and how backups are generated that makes it impossible to restore a backup within SQL Server from a higher version to a lower version. You'll need to migrate the data using SSIS, bulk load processes, or a third party tool.