My wife has a order of withholding of removal. We are living on the island of Saipan in the Northern Marianas Islands (a territory of the United States). We would like to return to the mainland and eventually get her green card. How do we petition to get her parole office changed, and how do we transition from Withholding of Removal into a green card by marriage? We have been told we have to reopen and then close the withholding case but his does one do that?