Adding a file to a Solution Items folder with a custom Project Template Wizard for vs2010

Dearest All,

I'm trying to create a template for a Test project. I want this template to add several items (e.g. a vsmdi file) to the Solution Items folder. I've created a Template Wizard, and was able to create the Solution Items folder, but I cannot add a file to it. How do I do that?

Thanks in advance