[Dead Eddie]

To be fair, changing the template used on the fly isn't exactly standard functionality.

There's no great way to do it, but you should be able to hook into vbcms_article_populate_start and recreate the $view object.

Completely untested:

PHP Code:

if(self::VIEW_PREVIEW == $viewtype && $this->content->getParentId() == 1) //set to the node id of your home page.
{
$view = new vB_View_Article('vbcms_content_article_custom_preview');
} 


This would have to be repeated for other content types as needed...

(Actually, on second thought, ignore this. It'll only work if your home page content is assigned to the hme page)