Rewrite Role: navigation toolbar trouble

["Michele Mase'" <michele.mase@xxxxxxxxx>]

I need that the url http://www.example.com/a.htm will point http://www.example.com/a/b/c/d.htm; in navigation toolbar of the browser you should view only http://www.example.com/a.htm.
I've "solved" using a symlink between the file /webroot/a/b/c/d.htm and /webroot/a.htm.
Is it possible to solve it by using some rewrite roles/ or some httpd configs?
Regards
Michele Masè