Vim: xml and html auto tag completion

Downloaded the ftplugin from here:

http://tritarget.com/cgi-bin/viewcvs.cgi/xmledit/ftplugin/xml.vim (pointed to by here: http://www.vim.org/scripts/script.php?script_id=301)

copied the file to ~/.vim/ftplugin/xml.vim

at this point XML completion works (.xml files) but html does not.

once the plugin was triggered and installed witha deleteme.xml file, I followed the instruction at did this:
:help xml-plugin-html

I copy pasted the html.vim file in the help to a new file:
~/.vim/ftplugin/html.vim

and then loaded my rhtml (or any html file that autocmds to filetype html) and the plugin started working