I’m currently working on a project over at CodePlex that I haven’t published yet because I want to make it a little more awesome before I draw back the curtain. The focus of the project is a Visual Studio integration that has a Custom Tool. Part of the work involved creating a new Item Template. For anyone unfamiliar, an Item Template is just a zip file with a .vstemplate manifest file inside telling visual studio how to include the items in the zip file into the project when the item is selected in the new content item window.
What I quickly ran into though was that specifying a custom tool in the template file appeared to not work at all. What I was doing looked like this:
You have to add the following wizard extension section to your item template or Visual Studio wont populate the CustomTool field with whatever you tell it.