To insert a photo into your post, you will need to have your photograph uploaded online somewhere.
I like www.photobucket.com. It is fast, free and easy to use. You do have to register there, but it is a very simple process.
Once your photo is uploaded to photobucket, you need to copy the line of text next to the word "Img" and paste it into your post. This will allow the photo to show up.
If your photo is uploaded somewhere else, you can still post the image.You will need the url of the photo you are trying to post. If you do not know the url, you can right click on the photo and check the image properties. The properties will list the url.
Once you know the URL, in the post where you want the image to appear, type:
Do NOT leave spaces between the [IMG] brackets and the url.