Hi,i think the clean way to do this is to define a metaContainer-facet for the document like this:
<tr:document title="index">
<f:facet name="metaContainer">
<f:verbatim>
<link rel="stylesheet" href="Path to CSS file"/>
</f:verbatim>
</f:facet>
</tr:document>
We're doing this in our projects and the advantage is that the
<link>-tag is placed directly into the <head>-container of the page like
it should be.
Regards, Torben

