Thanks, this is a good advice for the future but sincerely for the case I was, when I downloaded more than 100 outfits, it would be really time taken. I use to visit sites very seldom and so when I see something interesting I download all I like. I also don't put things in my downloads folder before I'm totally sure that I really want it or need it. It has happened many times that I downloaded things based on pictures and when I placed in my game I wished I could cry.
To run CI regularly is also a very good advice, it is just that as I said before, my dwlds has by now about 750 subfolders and I use to join meshes to recolors as much as I can (one file) so that I never have recolors without meshes.
I contacted one of my fellows that has a little bit more experience with outfits, hairs and recolors and got another advice that I think it would be interesting to add here. He said: " all meshes and recolors are connected thru Shape and CRES. These items have unique numbers and the numbers are repeated in the recolor 3D Id. All I had to do was to check the 3D Id of every recolor and compare with the meshes. As I downloaded only a dozen meshes and several recolors, it was not that difficult. Then before placing the final result in my downloads folder, I added the text "Mesh xxx" after the text found in the item and then it became "Made by xxx - Mesh xxx". It is so easy that it could have been done as standard. By the way, I got 5 items that don't match each other, even when I was so careful and several meshes that were so little different from each other, that I could just get the recolor and transfer to the mesh that had most recolors on. I ended up with only 6 meshes and several recolors.
Thanks girls. Boys are still better with numbers.
Joking! Problem solved. Thanks all for the help.