[Zope] Zope and stylesheets

[John Poltorak]

I've pulled something from the zope.org website which I want to 
iincorporate into my own but don't fully understand what is going on. Here 
are the lines:-

    <link rel="Stylesheet" type="text/css"
          href="http://zope.org/ploneNS4.css" />  

    <!-- Main style sheets for CSS2 capable browsers -->
    <style type="text/css" media="all"> @import url(http://zope.org/plone.css?skin=);</style>

    <!-- Custom style sheet if available -->
    <style type="text/css" media="all">@import url(http://zope.org/ploneCustom.css);</style>



I'm not very well up on stylesheets so apologies for my newbie questions, 
but how should I incorporate the lines above into my own website? Do I 
just need to import the files ploneNS4.css and ploneCustom.css into my own 
instance of Zope? And is it recommended to have a common stylesheets 
folder for all the websites served from a single Zope instance?


-- 
John