Time and Date Stamp Format and User name

Hi All,

I am very new to adobe acrobat so forgive my ignorance.  I am trying to add a date and time stamp to pdf files using adobe acrobat so that when they are printed using adobe acrobat the print date will be automatically added.  First I have found the below script on the forum which is entered as a field, will this work using acrobat version 5 or version 7?  Also i believe that the date format is 10/01/2009.  How can I change this so that it will be in the 01 October 2009 and 24 hour clock format?  Finally how do I also add some descriptive text before the date and time i.e. 'print date' and 'not valid 24 hours after printing'?

var f = this.getField("today");

f.value = util.printd("mm/dd/yyyy

h:MM tt", new Date());

One last question is there a way to add a user stamp to a pdf so that when the document is printed out the user's name is printed i.e. 'printed by J Smyth'.

Many thanks,

John