Nathan-
If you go to the email template and click HTML to view the HTML, you should see some items like
<img src="/Method/AccountPages/TemplateMichaelMelo/ImagesPublished/Chrysanthemum.jpg" alt="" />
change it to
<img src="http://methodintegration.com/Method/AccountPages/TemplateMichaelMelo/ImagesPublished/Chrysanthemum.jpg" alt="" />
You are adding http://methodintegration.com
Let me know if this works, if it doesn't send me an email using the template. I will look into this further and see if there is another way to avoid having to enter this manually.
-Michael