I'm glad that works for you.

In fact, it is doing the same thing, but inserting a field through specified shortcuts in menus. When I follow in Word 2007 the autotext route you specified, the field I get is

{ FILENAME \* MERGEFORMAT }

(You would see three spaces after FILENAME.)

This returns only the file name, not the path, which is what the \p in your post is for.

Cheers.