Entourage 2008 - Editing a received message's Subject?

[hoch71]

Version: 2008 Operating System: Mac OS X 10.6 (Snow Leopard) Email Client: pop I have followed Michael's previous advice and tried to download the script ....

>
> http://www.entourage.mvps.org/downloads/scripts/edit_subject.zip

BUT I don't know how to assign it a keyboard shortcut.

Can anyone help me?