http://tinymce.moxiecode.com/tinymce/docs/reference_configuration.html for reference on what you can add.

Specifically, you will want to take a look at http://tinymce.moxiecode.com/tinymce/docs/option_extended_valid_elements.html ... the defaults ignore things like alt tags for links and onmouseover for links. Adding what you're missing to extended_valid_elements will keep the "cleanup" from erasing your code.

in 6.6, you couldn't edit the built-ins, nor copy them, so the best you could hope for is to reconstruct them from what they looked like. Check for the other options you can add.
wg-fomATgwyDOTorg