Yes, Sunil, there is no problem to use the latest RadEditor in a regular .aspx page and then add it as external type to your Sitefinity project. We have just posted a reply to your support ticket about the toolbar styling problems.
Here is something that might be useful to know and is related to " the font-color property (set to orange) of radEditor does not get applied". The rich text content area
of RadEditor is an editable IFRAME element. This IFRAME is a separate document that has its own CSS styles that originate from the RadEditor skin. The default font appearance in the content area can be overridden by setting the editor's ContentAreaCssFile
property to point to your own CSS file, for example:
The CSS file should contain the following class:
Let us know if you need any further assistance.
the Telerik team