I love the way FileMaker 12 can do drag and drop on a container field. I know that I can right click and choose insert file and I will get the option I need. I want to know if there is a way to make it so via drag and drop, or any method of putting a file in FileMaker, it ALWAYS remains a reference? Or is the only way via the right click manual method.

Not directly.  But you can let the user drag and drop into a global container field then take that file, export it back to the hard disk and insert it through a script where you can set the reference toggle

But is there a way to get the original location of the file you drag and drop into the global field? Thanks

No.