Hi,
If I'm understanding your question, I think you're asking if ADR 2008 supports the ability to open and view DWG files in an embedded application? If I've understood the question correctly, then yes -- it is possible to view DWG files with the embedded control, but the catch is that you must also have DWG TrueView installed on your system (as ADR uses DWG TrueView to internally convert the DWG file to a DWF so that it can be viewed and marked up within the Design Review application).
You can download the DWG TrueView application from: http://www.autodesk.com/dwg
I hope that helps.
Scott Lillibridge, QA Manager
Extended Design Group
Autodesk, Inc.