That sounds interesting, but in this case the source is Irfanview's Thumbnail window, and it allows dragging selected images to other apps or to the Explorer, but it does not have the option to copy into the clipboard (it has its own copy menu).

As my need is for a single time project, I think I'll take the drop into the script icon option. BTW, what I need is to visually select some images from hundreds of folders where the images are named by the same numbering sequence, and give a new name to the selected ones when copying them into the destination folder to avoid overwrites, like adding a prefix with the name of the folder from where it was taken.

Thanks anyway!