My question involves divorce in the State of: Pennsylvania

Here is some background: My wife came here on a K1 visa (alien fiancee) and right now she is in process of getting her green card. She does not want to stay in the USA and wants to go back. We want to file a petition to the court and get this over with ASAP.
I have found this petition and affidavit of consent online: http://www.ilrg.com/forms/divorce-mc/us/pa

We want to file for divorce based on irretrievable breakdown of the marriage, with both parties consenting and will to file an affidavit of consent.
There are no children and all my wife wants property wise is some money and a plane ticket back which I am fine with. The amount of money is less than 500.
Please let me know if those forms are the correct forms that I would sent to the Prothonotary office at the local county courthouse?
I also have a few questions about the form itself:
1) There is an empty Docket # field, does the courthouse staff fill that out once they receive the petition?
2) Part 6 - Grounds for no fault: can you give me an example of that would go in here based on out situation?
3) Part 7 - Marital Settlement agreement: if no such agreement exists does that mean that the marriage will get dissolved as-is with no legal claims coming from any of the sides? Basically a verbal agreement?

Thanks in advance for your help! I just want this to go as smoothly as possible and luckily my spouse has the same goal.