I got my renewed in March 2008 with my visa had already been expired for over a year. I had just transferred to 4 yr university from Community college (it was my 2nd semester there). My accumulated GPA @ university was 3.8 for the first semester after I transferred. My cumulative GPA at Comm college was 3.26.  The document preparation process is exactly the same as we do in KTM the first time. It took me 3 days for the entire process to get the visa. Your are guided by the consultancy (as ones we have in KTM). These guys get you 3-day visa for MX. You get to Brownsville, TX a day head of the interview (once you send your documents, they will get your interview date and you prepare accordingly). 

On the interview date they come to the hotel lobby ( usually Holiday inn @ Brownsville). They brief about the interview process and then they take you to MX. Before you get to MX you get your visa and you straightly head to the embassy. After the bio-metric process you wait for your turn. After about an hour's wait they called my name. The questions they asked:

Do you not  go the same university where you initially applied at Ktm embassy?   

What are you studying ?

Good luck and come to pick up your PP after 2 hours.

I paid a fee (about $200 if I remember correctly). Walked thru PoE; but where again bio-metric process; took little longer where (no problems though, about an hour). Flew back to Dallas. Cost about $1,000 including everything, I mean about $1000 period.

Keep in mind, of about 25 total applicants 24 were Indian for H1B stamping. I was the only one for F1 stamp. All those 24 got approved, but 2 or 3 had to stay a day or 2 more for additional investigation. Everybody got their visa though. I got visa for 5 years, but my friend after a yr got visa for a year ( as long as his status for valid for). Now again I am hearing they are stamping fro 5 yrs, I don't know. 

I had no doubt (anywhere in my mind and heart that I will be declined so I never even had 2nd thought). I was an average student and kahile pani samajik maa kaam gareko thiena. 

You guys are all applying for PhD program . You all should have no problem. Good Luck. 

Get visa here and fly to Nepal. 

www.mexico-assistance.com is the consultancy's website. Good luck again