Here is a simple guide using a free image uploading site, imgur.
- Visit http://www.imgur.com, and register for a free account.
- Once you're signed in, you can upload pictures using the upload button located on the right side column.
- When the upload button is clicked, a box will pop up which will allow you to select the file you wish to upload. Once you hit OK, you are prompted with an upload box.
- Once it is complete, you will see the links for the file uploaded, copy the Direct Link (Email & IM) URL.
- Compose or reply to a post on the forum, and select the image upload icon, and paste the URL
This will paste an image into the post as an embedded image.