For a blog what you can do is right click on the picture of your choice:
... you get some sort of menu like i have up here.
Save image as... and follow where you are saving it on your computer.
Other possibilities: If possible, copy the image and paste it directly in the blog
or copy and paste the URL
that is the web adresse like http://www.lumin-essence.net/sitebuilder/images/spirit_of_light-450...