I figured this little technique out a while back and have been meaning to post the find. This technique that saves me a few clicks and some time. I stumbled across this because it just occurred to me once to try it with InDesign, and it worked. Later on, I figured if it worked in InDesign, then why not Fireworks? Lo and behold.

In both Adobe InDesign and Fireworks, you can import image files to the file you are currently viewing by clicking and dragging the file from Windows Explorer to the spread or canvas. (I would guess this also works on other platforms that support these programs.) This is a shortcut if you have Explorer open to the directory where you’re manipulating files. It saves going to File > Place (InDesign) or File > Import (Fireworks) and then browsing for the image file.