I will try to help you out on this as I just finished my packet without the help of a recruiter. I'm currently in the Air Force, so some of the things will be a little different, but all in all the packet is basically the same.
Concerning test scores: The ASVAB "General" score is the one most often given as a final score in the form of a percentage, in the AF this is the only score that they give you. You will either need to send your scores in to Zena, the Army lady who transcribes the general score into GT score, or you can request that your test results be formatted for the Army at the time you take the test. In general a 64% translates roughly to a 110, which is the minimum standard for this test.
I would suggest studying hard for the AFAST test, as you can never be too prepared. A fantastic study guide that helped me immensely was the ARCO Military Flight Aptitude test preparation book. NONE of the others were helpful. Cliffsnotes was terrible, the answers to the questions were incorrect and misleading. There was one more that was just as bad, I don't remember the name but it was written by a retired 1st LT, which I thought was really strange. That book was the worst. I would also suggest getting a couple of books on helicopter flight in general and spending some time learning as much as you can about the terms and how basic flight works. Being interested in all aspects of the craft is never a bad idea. Strive to make above a 120 on the test, but don't be discouraged if you score lower.
Concerning Vision: I have 20/40 vision (which is acceptable) but I had an astigmatism that was over the limits for the Army. (+/- 1.00 diopter astigmatism is all that is allowed and I have a -1.50 in both eyes.) Depending on what you wear the contacts for, you may need to get an exception to policy. I had to submit for one and it's what held up my packet from getting submitted sooner. Taking a good long look at AR 40-501 which you can find on the Warrant officer recruiting webpage is a good idea.
Ok, now for some more pointers:
Take a look at the warrant officer recruiting site.
http://www.usarec.army.mil/hq/warrant/ On that first page there is a list to the left. Breeze through the Civilian applicant side, and then go to the Active Duty Applicant side. There you will find a good do-it-yourself packet starter. I printed off the application checklist and then called the recruiter number on the site and had the guy go through the list with me line by line to find out exactly all that I needed. Just a word right now, I started the application process on November 30th and my packet is already submitted, so doing it yourself can really hasten the process. (I'm also a "squeaky wheel". I like to be present enough to be remembered, interested enough to know the process, and annoying enough to make them want to get it done fast and right. It's a balance.)
The recruiters on the website *are* a big help, but they expect that you'll get most of the packet done on your own or with a recruiter. They're exceptional for questions and they are speedy with answers.
I know that there are some differences reguarding forms and written essays between civ and mil, but the majority of the forms and resumes and flight physicals can be done of your own initiative. The main thing that takes the longest time is the physical, and scheduling the testing, once you're past that it's all downhill. If you have any questions reguarding the details about anything, I'm more than happy to help.
KeepTrying