Rajaharischandra,
My brother had the exactly similar situation.
1. If you want to DO CP( consular processing). Don't even think about it. I am 100 % sure ki, both he and his wife will be rejected. Ther is no doubt. U need to trust.
2. If your friend is in USA and his wife is in nepal or both of you are in USA, then both of you will be able to get green card.
i am not sure what is your situation. first tel me what is your situation, then i will explain everything i went thru. I tried to contact lawyer and some nepali broker. They all asked money. Heck. we are student. we can't pay that much money.
THe most important thing is don't apply I485 before October 2007. The filing period starts only after october 2007. For your case number about when to file, go to visa bulletin and know the priorty date for your case number. The lower case number can file faster than the higher one.
let me know if i can help you
jayamatadi