因此，我将其保留为最终解决方案，以防万一有人需要它：
1）将此代码放入您希望编辑器直接显示的.phtml文件中。
2）在代码第6行可以看到elements: "short_description"。你可以改变"short_description"与你想要的元素ID。您可以添加多个元素 ID，以逗号分隔且不包含空格。
Example:我把这段代码放入app/design/adminhtml/default/default/template/catalog/product/edit.phtml因为我希望编辑器在编辑产品描述、简短描述等时直接出现。
代码：
<script type="text/javascript">
window.onload=function()
{
tinyMCE.init({
mode : "exact",
elements: "short_description",
theme : "advanced",
plugins : "inlinepopups,style,layer,table,save,advhr,advimage,advlink,emotions,iespell,insertdatetime,preview,media,searchreplace,print,contextmenu,paste,directionality,fullscreen,noneditable,visualchars,nonbreaking,xhtmlxtras",
theme_advanced_buttons1 : "newdocument,|,bold,italic,underline,strikethrough,|,justifyleft,justifycenter,justifyright,justifyfull,|,styleselect,formatselect,fontselect,fontsizeselect",
theme_advanced_buttons2 : "cut,copy,paste,pastetext,pasteword,|,search,replace,|,bullist,numlist,|,outdent,indent,|,undo,redo,|,link,unlink,anchor,image,cleanup,help,code,|,insertdate,inserttime,preview,|,forecolor,backcolor",
theme_advanced_buttons3 : "tablecontrols,|,hr,removeformat,visualaid,|,sub,sup,|,charmap,emotions,iespell,media,advhr,|,print,|,ltr,rtl,|,fullscreen",
theme_advanced_buttons4 : "insertlayer,moveforward,movebackward,absolute,|,styleprops,|,cite,abbr,acronym,del,ins,|,visualchars,nonbreaking",
theme_advanced_toolbar_location : "top",
theme_advanced_toolbar_align : "left",
theme_advanced_path_location : "bottom",
extended_valid_elements : "a[name|href|target|title|onclick],img[class|src|border=0|alt|title|hspace|vspace|width|height|align|onmouseover|onmouseout|name],hr[class|width|size|noshade],font[face|size|color|style],span[class|align|style]",
theme_advanced_resize_horizontal : 'true',
theme_advanced_resizing : 'true',
apply_source_formatting : 'true',
convert_urls : 'false',
force_br_newlines : 'true',
doctype : '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">'
});
};
</script>
