How do you change XML files usually during upgrade?? (Basic MSI)
I think "XML File Changes" Tab has too few function to change old app.config to new app.config. Because many kinds of old app.config have been deployed already, xml change should have enough function to cover all of them.
If you think that the XML file change does not provide enough functionality, you can create custom action to call a C# / C++ function, which can handle the XML / XSLT files.
