Standby Testing

<p>In order to improve my chances for schools to which I am apply Early Decision/Action, I am hoping to retake my SAT Subject Test in Literature on the November test date. However, as this action was prompted by the mediocre score I viewed online today from my October test date, I missed the registration. I read online about standby testing and it doesn't seem too painful, but has anyone ever done it before? How do you know which testing stations are available? Any hints or words of wisdom?</p>