There is only one file type that uses the .NRI extension:
Nero ISO CD Compilation File
Compilation of files selected to be burned on a CD-ROM; contains a list of references to files and their locations on the hard disk; does not contain the actual files themselves; used by Nero when burning a CD.
NOTE: If any files have been moved or deleted after being included in the NRI file, they will not be burned to the CD.
Updated: July 22, 2008