Sending content-type response http headers from templates

Is there a best way to do this? 

I have tried using the Java methods to set content type in this way <%@ page contentType="text/css; charset=UTF-8" %><% response.setContentType("text/css; charset=UTF-8"); %> but both of them did not work so it seems as if futuretensecontentserver is overriding my java commands.

I would like to have it set to different mime types so that I can send any content type and not just text/html. 

Thank you!

- ceda