Attach NDF file to existing database

I have and NDF file with Data that came from a restore that I need to attach to an existing database.  Unfortunately, the restored database cannot be restored again because it is too large for the space we have available (it is approx. 2tb).  I would like to gain access to the data in the NDF and transfer that data to an empty table I have in a database.  I have tried creating a new database and ATTACHing but no luck.  I have also tried over writing the empty file with the NDF with data and the file GUID references are different so it doesn't like that either.  

Any ideas?

Thanks, Scott