For uploading photos
When you go to type something in you should see under the text box, a button called Go Advanced. Click on that. Scroll down until you see a button called Manage Attachments. When you click on that a new window will come up, if you click the browse button you can choose a photo from your computer. You should then see the URL in the new window, click the Upload button that's right nest to the Browse button. Once you've done that then scroll back up and on the tool bar next to the tabs that say Fonts, Sizes, Colors, and Smilies, you should see on that says Attachments. Click on that and a scroll down menue should appear with the name(s) of the photo(s) you uploaded. To place it in you text, click where you want it in you text then click on the name of the photo you want.
When you click on it will show up as [ATTACH] [/ATTACH], with numbers inbetween the [ATTACH]'s. Once you click submit reply your photo should come up.
If you want to add a photo from a URL, copy the link of the URL then when you go down to the text box normaly (what it looks like before you click go advanced) at the top next to the scroll down tab that says colors and the globe with the paperclip thing next to it there should be a yellow box with a mountain looking thing on it and a square thing in the corner of the yellow box. Click on that, then just paste in your URL and click ok. The link will then be added in your text, once you click Post Quick Reply your photo should come up in your post.
I think theres one other way to add it from a URL so if either of these don't work for you just let me now and Ill tell you the other one
Hopefully this wasn't to confusing to understand hopefully it helped you out