Replace this item checkbox

[cpatrick]

It would be wonderful to have a "replace this item" checkbox option.
For example, if I have to upload seven files to various
subdirectories, it would be great to select those seven items, drop
seven items (or a folder with seven items) into the "browse or drop
here" upload area, and have The Right Thing happen. If I selected
seven items but only dropped six, or if the items I uploaded have
different basenames than the items I selected, it would throw an
error.