It's easy...
copy the pictures location, as in the webaddress.
Like this: http//www.iownjoo.com/ownjoo.jpg
And then write out these nifty little html tags: [img]xxx[/img]
And just put it, the link to your picture, where the xxx's are.
If you did it right, when you submit you should have pictures in your thread. Yay.
Here's an old picture of my car, I won't bore the viewers of AF with my car... they've all seen it.