You're not alone - searching for Porsche 911 here should bring up quite a few of the forum goer's cars. And Jeff, who owns and runs the site, has (or at least had) one of those 917 block tables.

As regards posting images, the first thing is that this site doesn't host images itself, so you need to find a picture host online. I use Imageshack (www.imageshack.us), others use Flickr and there are many more. I like Imageshack as it makes it clear which link you need to post on forums (the "direct link" to the image), whereas it's not as clear with Flickr. Each to their own though.

I tend to avoid the "Optional Image URL" line here when I'm posting images, as it's a bit inflexible.

Instead, I paste the direct link into my text, highlight it and press the image button above your text (it's the one second from the right that looks a bit like a television). This should wrap the image codes around your image. You can also do that as many times as you like in your post, if you have multiple images to show us. No-one really minds if you try it out a bit, especially if you have nice pics to share :)

It's worth using the preview button before posting to make sure it's all worked properly.