Hey Fred,
The only way to do such at thing at this point is to upload the image to the HOG and link to that image in HOP...
When you get the image loaded into HOG, get it so that you can view the thumbnail, then right click the thumbnail and hit 'Copy Image Location' (the verbage may be different in IE, but make sure you select the Image location, and not the link location for the copy )... Then go into HOP and 'Paste' the Image location into the URL area...
If you have problems, feel free to ask..
LK