Oh thanks for that pointer Shazzbot.
Well it was very simple.
I entered at 1.pm paid 330USD.
Then I was taken to a window where an Irish guy asked for my documents. He asked for every single one that I mentioned in a previous post. One by one, bank statements, police clearances etc. I had them all ready to hand over with photocopies.. He said take a seat and we will call you. I waited 90 minutes till 230. Then the american interviewing officer spoke to me from another window. It lasted 2 minutes. I was asked to swear that all docs were genuine. We chatted informally about my plans in the USA. He asked where I studied in University. He told me I needed to register for the courier company in a clear and patient tone. Then he said ;Your visa is approved". I thanked him and I was on my way. Very nice, friendly guys working in there. Nice guys in the security office outside. It was a very pleasant and low-stress experience.
Congrats Annanz!