WSS Tips on Trick - 02
How to create a RichTextBox on WSS 3.0 / Moss. Ho ho... is so easy you don't have to used other control or third party to implement this.
I will give you a example and code how to implement RichTextBox on the WSS 3.0.
<textarea name="txtTextArea1" rows="6" cols="20" id="txtTextArea1" title="Body123" class="ms-long" ></textarea>
<script language="javascript" type="text/javascript">
RTE_ConvertTextAreaToRichEdit("txtTextArea1", true, false, "", "1033", null, null, null, null, null,"FullHtml", "\u002f",null,null,null,null);
</script>
and then in your page you will get this:

Note : make sure that your page is included with this javascript :
<script type="text/javascript" language="javascript" src="/_layouts/1033/form.js"></script>