best way to do dynamic style sheet

[scphantm.scphantm.gmail.com]

unfortunately my app requires a dynamic style sheet.  in the php world i did this pretty easy with

.kb_but_0_up {
     background-image: url(<%= $varfileurl %>);
}

in a php file and then just a simple

<link class="component" href="dynamiccss.php" rel="stylesheet" type="text/css" />

done it for years, worked great.  now im trying to do the same in seam so in my dynamiccss.xhtml file i have

.kb_but_0_up {
     background-image: url(#{keyboardGenerator.getKeyboardFile(0, 'ZERO')});
}

and i reference it

<a:loadStyle src="/stylesheet/dynamicCSS.seam" />

everything renders ok, but when i try to pull up the style sheet i get an exception

21:11:39,248 ERROR [viewhandler] Error Rendering View[/stylesheet/dynamicCSS.xhtml]
com.sun.facelets.FaceletException: Error Parsing /stylesheet/dynamicCSS.xhtml: Error Traced[line: 2] Content is not allowed in prolog.
     at com.sun.facelets.compiler.SAXCompiler.doCompile(SAXCompiler.java:234)

are there any tags in seam that i can insert into my xhtml page that will end up rendering it as a valid css file?

and before you say it, no i can't do an inline stylesheet.  for some reason when i do it adds several additional pagebreaks to the file and screws up printing the reports

[scphantm.scphantm.gmail.com]

ok, i found that i can use

<s:fragment>

to trigger the stuff in the xhtml page of my dynamic css file.  but now the problem is when i do that something somewhere puts a

</html>

at the end of the file.  this of course breaks the css page.  any ideas how i can turn that off?

[scphantm.scphantm.gmail.com]

got it, add

<f:view contentType="text/css"
xmlns:s="http://jboss.com/products/seam/taglib"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core">

to the beginning of the file and close it at the bottom.  works great