CKEditor_config["stylesCombo_stylesSet"] = "my_styles:style_lists/stylelist1.js";
needs to be added manully after the following line:
$CKEditor->editor("ContentValue", $CKEditor_initialValue, $CKEditor_config);
and the style_lists/stylelist1.js file needs to be created in the webassist/ckeditor directory.
the link code needs to be added to your page within the head section., just before the closing </head> tag of your page.