I have previously been able to use namespaces with the IdQ attribute in ribbon xml to allow different applications to share user-defined ribbon tabs and groups - an example:
<?xml version="1.0" encoding="UTF-8"?>
<customUI xmlns="http://schemas.microsoft.com/office/2006/01/customui" xmlns:x="urn:ns:myNamespace">
<tab idQ="x:tabRibbon" label="Custom tab">
<group idQ="x:groupLookupTool" label="Interactive Lookup Tool">
<button id="btnFindCommand" label="Find a Command" size="large" imageMso="CreateReportFromWizard" screentip="Interactive Lookup Tool" supertip="Point at Excel 2002 buttons and commands to see them in Excel 2007" onAction="openApp" tag="C:\Program Files\Microsoft Office\Interactive Guides\Interactive - Excel 2003 to Excel 2007 command reference.exe"/>
<group idQ="x:groupTraining" label="Get Online Training">
<button id="btnTraining" label="Up to Speed Course" size="large" imageMso="MovieFromFileInsert" screentip="Up to Speed Course" supertip="Learn quickly how to use Excel 2007." onAction="openPage" tag="http://office.microsoft.com/en-gb/training/HA102189871033.aspx"/>
Then other people can define similar xml using the same namespace and Excel will merge the groups correctly. This works fine when you can control the xml, but I have a developer using VS 2010 who has set up a complex ribbon using the ribbon designer, and does not want to redefine it using the xml file route.
Is it possible using the visual designer to insert the correct namespace and idQ tabs to allow this sort of usage?
Alternatively, is there a simple way for him to export from the designer but still use the callbacks he has defined?