This is something you're going to want to hire a local defense attorney in New Jersey to help you with. That'd be the easiest way of making this happen.
This answer does not constitute legal advice and does not establish an attorney-client relationship.
NJ has approved programs. But it is Indiana that has the say so. I would research the list of approved programs and have they OKed by Indiana. I do not know if all this plus the program can be done in 2 months.
Look at the New Jersey Dept. of Human Services, Division of Addiction Services at http://www.state.nj.us/humanservices/das/home/index.html. Look at the Treatment Provider Directory. Call one of the facilities and make arrangements for outpatient treatment after making sure Indiana will accept it.