[Plugin: TinyMCEComments] insert image

hello,
I wish to insert image in comments.
My blog is private and there will be no problem to active this function like in posts.

I don’t know how to add this function of tinymce, available in posts, for tinymce comments.
Can you help me and tell me what code I have to add ?

Thank you so much
Ronald

http://wordpress.org/extend/plugins/tinymcecomments/