Dan,

 

>>Is it possible to rename (add a textbox value) to an uploaded file?

 

You can rename the files after you upload the files to the server. However if you want to rename the files in the fly when uploading, this feature is not supported.

 

>>Also i want to set the default font (in a freshly loaded editor) to Arial but have failed to find the setting anywhere!@#

Please check EditorWysiwygModeCss property and EditorBodyStyle :

EditorWysiwygModeCss:
 
Specifies the location of the style sheet that will be used by the editable area. Multiple Style Sheets are supported.

Example:   editor.EditorWysiwygModeCss = "example.css,~/portal.css,/default.css"    

Editor.EditorBodyStyle Property:

The style to be applied to the Editor body.

Example: editor.EditorBodyStyle="font:normal 11px verdana,arial; background-color:tan;Color:white"

Hope it helps.