Automatic selection of last uploaded file

Hello to all,
I have installed the ckeditor-ckfinder solution for a project and it´s working fine, but i have the following need: whenever the user uploads a file, i need this file to be automaticly selected or, if this is not possible, it would be great to display the list of thumbnails-files ordered by the last uploaded file and not alphabetically. When you manage with few files, the sistem runs fine, but when you plan to upload and manage hundreds of images, its a waste of time to upload the file and after that locate it and select it in order to assign it to the input file field.
Any help would be highly appreciated.

Thanks in advance and greetings from Spain.