after dragging your XML web part to your web page... click on the drop down labeled web part menu. click on modify shared web part. then click on the XML editor button and enter the following code:
*ENTER: your portal sever address after the "helpLink=" (in the code)
*Look for Type your message (in the code)
Code:
<tr>
<td valign="top"><div WebPartID="b9b5971f-df9f-4ceb-a880-326f37f4f954" HasPers="false" id="WebPartWPQ10" width="100%" class="ms-WPBody" allowDelete="false" helpLink=https://PORTAL SEVER ADDRESS style="height:0.27in;overflow:auto;" ><marquee> <P><STRONG><FONT face="Courier New" color=#008000 size=4> <STRONG><SPAN style="FONT-SIZE: 16pt; COLOR: green; LINE-HEIGHT: 115%; FONT-FAMILY: 'Courier New'">TYPE YOUR MESSAGE HERE</SPAN></STRONG><SPAN style="FONT-SIZE: 16pt; LINE-HEIGHT: 115%"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></P></FONT></STRONG></marquee>
</div></td>