VS2012 add a project template with custom params

Hello,

I have a addin with a project template.
In my addin code I create a new project out of the template.

SolutionFolder folder = ...

if (folder != null)
{
 folder.AddFromTemplate(templateFileName, newProjectPath, newProjectName);
}

I want to pass some additional parameters which should be replaced (same way as  $safeprojectname$)
I want no interactive action, like manually filling a wizard form.

How can I achieve this?

best regards
Stephan

best regards Stephan Hartmann ML-Software GmbH