Rich HTML (source code) editing with Bespin

Hi, it looks like Mozilla's Bespin has already been integrated as a plugin for CKEditor, but not FCKeditor. I wonder if anyone is adept at modifying this plugin so that it works for FCKeditor v2?

Below is the link for the CKeditor version.
http://dev.ckeditor.com/changeset/4478

Thanks in advance.

PS, if you are not familiar with Bespin, you should test it out. It is an excellent replacement for the source code mode editing.