Whoops, I read that wrong. But, this is the format I use to preregister variables (my cheatsheet blurb below):
PHP Code:
vB_Template::preRegister('FORUMHOME', array('uid' => $uid));
Now you can use {vb:raw uid} in the FORUMHOME template
According to what you wrote above (without extra $):
Code:
$templatevalues['optoutforumbits'] = $templater->render();
vB_Template::preRegister('option', $templatevalues);
The variable you would be using in the template would be {vb:raw templatevalues.optoutforumbits}