Do you already have a link with the pictures active? I can take a look and let you know what you’ll need to add.
The basic way to add a picture –
<img src="http://Link_To_Your_Image.jpg" alt="Affiliate Picture" />
How to make it a link –
<a href="http://Add_Your_Affiliate_Link_Here.com"><img src="http://Link_To_Your_Image.jpg" alt="Affiliate Picture" /></a>