Well this can be done in the HTML Version of editing the article. With the following code.
<img src="IMAGE URL" title="IMAGE TITLE" align="SIDE" height="128" width="128">
A few ways this can be edited...
IMAGE URL -> The http:// address to the image
IMAGE TITLE -> Text that appears during scroll-over
SIDE -> Must be Left or Right, decide which side of article image will appear
height="128" -> The number in the section can be edited to decide the height of the image
width="128" -> The number in the section can be edited to decide the width of the image
If you have anymore questions, please feel free to ask.
P.S. - I'm working on perfecting this method, by use of the templates to make it much easier to use a feature like this for every article. I will make a tutorial over the weekend if i get time.