There is a way to drag-n-drop images into a web viewer, and have it do whatever. It requires both AppleScript and a "script event" plug-in; both of which are free. But it is a very tricky business, advanced level, with several pieces. Someone else (smarter than us :-) figured out how to do it.
So, if this is just for you, my advice would be to buy the Troi File plug-in, which has extensive support for this.
Thank you very much for your help Jones.
If you are runnng off of one Mac or can share an iPhoto library I know that drag and drop works on linking images in iPhoto 09 to containers in Filemaker Pro 11. At least on my Intel iMac drag and drop creates a reference link to the iPhoto library which actually creates images visible in Filemaker where they print to my Canon printer or to pdfs. Of course, if you port your database file to another machine and the iPhoto reference link is broken an err message appears in the container field --nothing fatal, just a broken link.
Since iPhotos is so good at organizing images this arrangement may actually work to ones advantage.