The OBJECT classid, param name, and value must all be kept syntactically
just like they are (not sure you need the id but I don't think it will
hurt either).
In the code that you have below, simply replace the string "Calendar"
with:
"\\Public Folders\All Public Folders\[FolderName]"
Make sure to replace the [FolderName] with the name of the public folder
that you want to show. So, the entire contents of the CEWP to show a
public folder called Todd would be as follows:
<OBJECT id="MyToddPublicFolder"
classid="CLSID:0006F063-0000-0000-C000-000000000046">
<param name="Folder" value="\\Public Folders\All Public Folders\Todd">
</OBJECT>