In a FM 11 book, how can I display filename w/o file location?

In a FrameMaker book, how can I display filename without the file's  location on the hard drive?

For example, The book would list:

"MyFile.fm"

instead of

C:\windows\documents\Framefiles\XYZ Company\widgets\draft_2013_1111\MyFile.fm

If this cannot be done, then how can I get the book to list a name for the added file other than the name of the first heading in the file contents?