let me see if i am following your steps correctly ...
cool!
you asked: "
How did you avoid the file to be shown as a thumbnail below the uploaded text?"
when you go through all the crazy steps listed in the FAQ it takes to
insert an image rather than simply attaching it (and repeated in the instructions file i posted) , the thumbnail no longer shows at the end of the post.
i like your method better than the way we are instructed to do it in the FAQ.
the fact that the thumbnail remains is - to me - an insignificant detail.
now ... if i can just remember it. lol