Ok, here is the problem.

I have a tree of content data that can be display 1 of 4 different ways (each way represents a region in the world).

Therefore a piece of content cannot have a singular template as the template can change based on region.

I have successfully developed a way to show each single piece of content the four different ways.

However, preview is a bit of a nasty piece of the puzzle.

I have had to disable 'normal' preview for each individual content since it assumes you want to preview the piece of content with it's selected template.

What I really need is a way to take a Node; generate it's preview xml and marry it with a template of my choosing.

Is there a way I can set the value of '$currentPage' before the macro's render?

I can connect the rest of the dots after that.

I have tried to reverse engineer the Preview class in the core:

public partial class Preview : UmbracoEnsuredPage
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            
            Document d = new Document(int.Parse(helper.Request("id")));
            
            PreviewContent pc = new PreviewContent(base.getUser(), Guid.NewGuid(), false);
            pc.PrepareDocument(base.getUser(), d, true);
            pc.SavePreviewSet();
            docLit.Text = d.Text;
            changeSetUrl.Text = pc.PreviewsetPath;
            pc.ActivatePreviewCookie();
            Response.Redirect("../../" + d.Id.ToString() + ".aspx", true);
        }
    }

But I'm not sure that is the right path to head down.