Shawn Gilmour of Autodesk recorded a few quick AutoCAD 2006 video tutorials with audio. These videos were recorded in the Microsoft wmv format and can be played in the Windows Media Player.
Introduction to the AutoCAD 2006 CUI Editor Link
Introduction to the AutoCAD 2006 Workspaces Link
Creating a Toolbar with the AutoCAD 2006 CUI Editor Link
Creating a Flyout Toolbar with the AutoCAD 2006 CUI Editor Link
Introduction to the AutoCAD 2006 Enterprise CUI files Link
