Hi there phillman5
Have a look at this post on getting data from a container, this should help you get the filename and the filepath.
With regards to drag and drop, this is not posable using FileMaker alone, however there are some plug-ins out there that can do this,
Troi File http://www.troi.com/software/filedetails.html does have a drag and drop fearure.
SuperContainer http://www.360works.com/supercontainer/ also does in the new version i believe
I hope this helps