Im not sure of any way to "drop" files in, without jail breaking.
With the exception of itunes library.
What types of files are they? (music, plist, images, pdf)
EDIT: You
can access a user directory for building purposes on your local machine, but I think that is only for the Simulator.
AFAIK any files included with your app will be part of the app bundle and inaccessible in the "user" directory.