TyniMCE style dropdown

Hi,



anybody know how to display *.css content in TinyMCE (in admin side) style dropdown?



I modified “lib\tinymce\tiny_mce_init.js”:

===

theme_advanced_buttons2 : ‘styleselect,formatselect,fontselect,fontsizeselect,|,link,unlink,anchor,image,media,cleanup,|,sub,sup,charmap’,



content_css : ‘mystyles.css’, (created a simple *.css file in 'lib\tinymce')

===



but the displayed dropdownlist is empty anyway…