You can mention it in the topic (i.e. post a reply), then other member that would read the topic would see your reply at the end. The same way, before processing pictures of a topic you would have to read first all messages to see if somebody will process it.
I'll continue to do the image uploads of Rinspeed's topic; as these are usually European cars for French shows, it is easier for me than for you I guess
Now we just have to contact wickey or hope that he reads this topic...