But Total Commander with possibly the AnyTag plugin might come close. It won't fill everything on that list but after this much time and it appears you didn't find it, I'm going to answer with a few ideas.
1. http://www.ghisler.com/index.htm Total Commander and plugins.
2. Have it written if you don't write your own.
Bob
Hi, could anyone suggest for me a file search sytem for windows with some or all of the following features?
Thanks
-*option to look through mp3 tags, photo details, and other file details you can normally find in "file properties"
-shell extention to "search this folder" with said software
-*set a file age date range
-*search specific folders and i'ts subfolders
-search a set of folders (like check off which ones to search)
-*find duplicates with an option to place one copy to a target destination and option to delete or leave originals
ones with * are absolute must, without star would be nice.
If I have to use more than one program to have all or some of these features, that is fine.
I already have "search everything" and love it but its not going to help with these other things
again thanks for any help.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic