Let me share my experience that would help a lot of students for reall.

I am in F1 and my visa was expired in 2007. I would be graduating in ths June 2010. The last time I went Nepal was in 2005 when I had a valid visa. It was already 4 years missing nepal. So, I decided to go Neapl in December where I had 3 weeks winter break.  I knew i had taken a risk. But it was the perfect time for me to renew the visa.

I went to Nepal and applied the Visa. Gave the interview. the only doc that i had was - Letter of status from university, officail transcript, the amount of fee that I have been payin for the university last 2 and a half years and a Bank Statement of 5000 dollars.

The counsellor asked me several questions. She was a kind of rude and asked me like what I did last several years. She went to my Sevis, went to my official transcript. At one point the way she was, I was thinking at the spot like why did I came to Nepal meaninng that what I am gonna do if she gives me a hard time. But at the end, she saw that I was going in university, graduating in June, has taken class more than full time, descent GPA and finally I got a visa.

I got a visa till 2013. Now no worries for me. No worries for visa for going grad school as I would definitely visit nepal before going grad schooll .. . . . 

Hope this will help most of youll about those cases whose visa's are expired and wanna go nepal and renew the visa. goood luck for those who are in this cases .. . . .