[Zope] How to share CMF-Skins

Perhaps this is a stupid question and perhaps this isn't even the right place to ask it. So: sorry if I'm all wrong. I'm in the process of setting up a number of CMF-based sites and one thing is increasingly annoying: Whenever I make a change to my customized skin (german translations, quite different layout, a number of special functions) I have to manually copy all the changed DTML-Methods and -Skripts to all the CMF-Sites. This is all within one Zope-Server. Is there any way to set up a common folder for all the CMF-Sites to use? Best regards, Jo.