perl files under subversion with keywords

To set keywords for all files, (well only for those under version control)
"c:\Program Files\svn-win32-1.4.2\bin\svn.exe" ps svn:keywords "URL Rev Author Date Id" *.*

Then add the following to your perl file:

#/* $URL$
# $Rev$
# $Author$
# $Date$
# $Id$

I know there is a way to change this to be default behavior, maybe I think.