If you are using the ASP.NET AJAX version of the RadEditor for MOSS the property that you can use is not UseEmbeddedScripts but EnableEmbeddedScripts.
In addition, please consider upgrading to the latest version of the control (5.3.0).
I hope this helps.
the Telerik team
Check out Telerik Trainer
, the state of the art learning tool for Telerik products.