Not to sound pretentious or rude or anything, but isn't that why it's called a "short answer" question? I don't remember what the actual questions were, as I answered them a while back, but I don't think that they're supposed to be detailed in nature, nor are they supposed to distinguish you from other scholarship applicants because they're not essays. You said that you are only applying to the President's Achievement Scholarship, but everyone is automatically considered for that scholarship, so there is no real application or application process for it. Other scholarships however, have extra requirements/an application process. For example the Terry Foundation Scholarship requires that you write a an essay about a significant setback/challenge/opportunity.
I think that for the President's Achievement Scholarship, they look more on what you put on your actual application (grades, classes, volunteering/extracurriculars, etc.), rather than the scholarship short answer questions. Actually, I think the scholarship short answer questions are there specifically for the separate scholarships that are available to apply for, but they just make you answer all of them as a formality, even if you aren't applying to all of them.
If you really want a scholarship that would allow you to distinguish yourself from the crowd, you'd have a better chance of getting it through the separate scholarships, because there are less applicants since not everyone is automatically considered, and you have more of an opportunity to showcase how unique you are (essays--if they require them). However, seeing as the deadline is in a few hours, you might not want to do that. The essays are significantly shorter though than the Topic A/B/C essays in the general app, so I think you might be able to rack up maybe one or two decent ones in that time crunch.
Best of luck!