I created a template hook in my plugin, then called the appropriate hook in whatever template I wanted.
For example:
PHP Code:
$templater = vB_template::create('my_template_name');
$templater->register('my_variable', $my_variable);
$template_hook['my_hook_name'] = $templater->render();
Then in the template, I just added the hook:
Code:
{vb:raw template_hook.my_hook_name}