How to post a picture?

Right click on the photo, click on properties, copy the URL.
Paste the URL on your post on A2K.
Highlight the pasted URL and click on Img on the tool bar. (That wraps the URL with the requisite code.)
Add any text your want to type.
Hit reply

You have to use a site that puts the picture in the right format. I use image shack. Then when you have that link, you can use the "img" in the BBcode Editor to post the picture.

Right. If the URL doesn't specify GIF or JPG in the URL, you may have to reformat it as TTH suggests. If the URL already has it in GIF or JPG format, then you can follow instructions above.