How to search files in .nri?



I am using XP and Nero6.
After I burnt a data cd, I’d save the CD project as .nri in \My Documents\Nero and now there are many .nri files in the folder.

How can a search a particular filename or search with wildcard within so many .nri files?
Somehow the search “a word or phrase within a file” doesnt work with .nri in XP.

What can I do?