I just walked through the steps we described previously in order to be sure all is working as expected. Here are some screenshots I made during the process, that might help you with this task.
Now, maybe this step is the closest to your question. Load the RadMenu control in Visual Style Builder. Feel free to edit the drop-down menu's appearance as you wish it to appear when in the ribbon. Choose the Save As option form the File menu and save the theme in the same file from step 1. VSBMenu2.png displays exactly the elements that you should edit in order to change the looks of the drop-down-menu and its items.
- Open Visual Style Builder (VSB) and load the RadRibbonBar control. Create a new or modify an existing theme. Give the theme a name and save to a file. This might also be your custom theme you had already created. (see VSBMenu1.png)
Now open the saved theme file (XML), with your favorite XML editor, like VS 2005, and search for the string "Telerik.WinControls.UI.RadDropDownMenu". Replace it with "Telerik.WinControls.UI.RadRibbonBarMenu" . See VSBMenu3.png.
Here is the result:
Let us know whether we are missing something.
the telerik team