I'm by no means an expert on UPS hiring, but what I have read on forums is that if you answer "no" to the preliminary questions you get locked out. Hell, even if you answer "yes" to all the questions some dudes still get locked out and have to email HR. If I were you, I would wait to get my ATP. The chances of getting "furthered" without one are probably slim anyways, unless you have rec or someting, I don't know. I applied to a bunch of airlines a year or so ago without the ATP and I got zero calls.