Jimnik can you tell me how your experiment worked? I hate those thumbnail things?
You see the "Photo Galleries" link at the top of the window? (Just below the "User CP", "FAQ" and "Members" links).
Select "My Photo Gallery".
Here you can upload any photos from your computer onto MTF (this is effectively where you store all photos that you want to post on MTF.)
Once you've uploaded a photo, click on it and there's a "UBBCode" just below it.
Copy and paste this code into your post and VOILA.
Sorry if it sounds complicated. Try it and tell me if you get stuck.