Thanks a lot people, I feel really flattered!
To all those who think they can't sketch: I don't have any artistic talent either (that's why I am not becoming a surgeon, but a radiologist
), but the sketches don't have to be perfect at all. I can only encourage you to try it, it's real fun and it improves your observing skills tremendously.
As for the management of attachments: I wanted to place the drawings directly into the text, where the links are now. I used the "Insert Image" button for that, which asks for the internet address of the pictures and then implements them in html code [img]address[/img]. When I preview the post, the pictures are directly shown, as it is supposed to be, but as soon as I make the posting itself, it's only links that are left.
I have no idea, why this happens, in other forums it's no problem, on the other hand, it's not that bad anways, as long as everyone can view the pictures!
Sebastian
P.S. I'd like to see some drawings of objects I can't sketch from the Northern Hemisphere - so give it a go, all you Australian people!