Possibility of using alternate XML namespace?

Hello,

I'm trying to use Amaya as a WYSIWYG editor with Zope generated pages. These 
pages are XML standard but use an alternate namespace, (<img 
tal:replace="foo" src="">). When I  open a page in Amaya with them, Amaya 
complains, and when I save the page, all the 'alien' xml got removed :-(

Is there a parameter to tell to Amaya to not touch alternate namespace, or any 
other way to make edition work?

Thanks,
Luc Stepniewski <lstep@adelux.fr>