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(09-12-2010 09:03 AM)patrese Wrote:  Hey, yes I did that thanks
It works of course, I just don't see anymore where I can set the thumbnails..
Is that correct? If so, then I will just keep it as it is with the upload box

The server needs the image on its disk to be able to generate a thumbnail (and obviously needs to store it on disk), so no, there's not much you can do there.
Only alternative is to use an external image hosting service which produces thumbnails for you - you'll need your users to upload there and perhaps fill in a thumbnail field, or use the text mask filter to construct the thumbnail URL (if possible) from it (will require you to be familiar with regular expressions).