You need to upload the picture to photobucket (or another photo hosting site) then use the IMG or Direct link code to insert the epicure into a post using the picture button above the text entry box
Yep photobucket is about the easiest way to do it. You can do the same thing on this site if you upload your pictures to the gallery, but if you want to use photo bucket it's free and holds a lot of pictures.
Once you upload your pictures your page will look like this, hover over the picture you want and you will see a bunch of codes under the picture.
Then click "IMG code" and paste it directly into your post.