Another thing to keep in mind, if you don't like the results, it is very easy to undo a directory junction, just delete the directory junction itself and move the data back to the original folder or use the registry edit method to point to the new multisamples folder. To my knowledge no one has ever gone back to registry edits once they start using mklink. I have been promoting mklink for some time. Searching the forum should come up with numerous examples where they have been used for moving Cakewalk sample folders, for example
http://forum.cakewalk.com/FindPost/3086804. And directory junctions work the same for moving data for other application too. No need to know anything special about the applications, the OS handles the redirection for you.