If you're an AutoCAD subscription member, you have access to the new DWG Convert tool.
Helping make it easier to collaborate, the DWG conversion tool enables you to translate AutoCAD DWG files to any of the following DWG versions: Release 14, 2000, 2004, 2007, and 2010. And since you can convert files in batches, you can quickly bring older file libraries up to date.
You can easily access the DWG Convert tool from the Subscription ribbon tab or toolbar, which are installed with the Subscription Advantage Pack for AutoCAD 2011 products.
With DWG Convert you can create a list of DWG files to be converted. Save the list for future use, create new lists, and open or append existing lists.
Conversion Setups enable you to specify the conversion properties such as file format and path options. You can specify how to store the converted drawings, in a Zip file or self-extracting executable, for example. Additional options enable you to perform actions such as purging the drawings or replacing page setups during the conversion process.
You can save multiple conversion setups allowing you to easily restore a specific set of conversion properties. For example, you may have a particular client that requires you to save all the drawings to AutoCAD 2000 file format while another one insists that you purge all the drawings and submit them in AutoCAD 2010 file format.