Well, I'm not sure if this is what you want, but if it is, there are two ways you can do this. Let's say your website url is http://www.shanesite.com. You would have to use the below code for your image:
<img src="http://www.shanesite.com/fp_images/image1.jpg">
That one would work, or you could do this:
<img src="/fp_images/image1.jpg">
Basically, the second one specifies to start from the root directory with the slash in front. Let me know if this doesn't work. :)