AUGI forums have CUI Menus covered...
Have you visited the "AutoCAD 2006 CUI Menus" forum ?
If no, you could well be missing out on some first class assistance and support from AUGI members as they happily and kindly share their new found knowledge on Autodesk's latest method of customizing and implementing Menus within AutoCAD and AutoCAD based verticals.
Here are a couple of threads to help you on your CUI journey...