Hi Phil,
Once they're posted (not just here but anywhere on the net) you can put their URL into the post and they post the picture, which is what I did above.
You can do this with the box of options (the "Instant UBB Code" box) below the window where you type in your post. If you click on "Image," it brings you another window to enter the URL (best to just right click on the image, select "Properties," select and copy the location, then paste it in), then hit enter. Done!
If you want to post them as you write, you can check out my oh-so-detailed instructions
***HERE***.
Hope this helps. I'm still not too savvy myself, but pitch in where I can.
Chris