[Koha] Can one get WYSIWYG interface for koha as a cms?

Hi I've added the changes to make koha as a CMS ( seen here: http://wiki.koha-community.org/wiki/Koha_as_a_CMS ) and I was wondering if anyone had made the Value field on the systempreferences.pl page use something like TinyMCE rather than a plain textarea box? Or if even that is possible? Any advice would be great Thanks Bob