Copy the entire drupalasset folder to the tinymce plugins folder, located within
the tinymce module folder at tinymce/jscripts/tiny_mce/plugins.
-- OR (for advanced users) --
create a symlink to the drupalasset folder so that updates will be less painful!
from the command line:
	cd path/to/tinymce/tinymce/jscripts/tiny_mce/plugins
	ln -s path/to/asset/tinymce/drupalasset



Paste this code into the _tinymce_plugins() function in plugin_reg.php located
in the tinymce module folder:

	$plugins['drupalasset'] = array();
	$plugins['drupalasset']['theme_advanced_buttons3'] = array('drupalasset');
	$plugins['drupalasset']['extended_valid_elements'] = array('img[class|src|alt|title|width|height|align|macro]');