Use filemanager in own plugin, own file manager types and filemanager callback?

Hello,

I have a few questions concerning the file manager api in CKEditor.

I already got it working by setting the links, that´s very easy.

But I wondered if there is a way to use a javascript callback for the filemanager? (I dont want to use a popup)

I was also wondering how I can implement the file manager button in my own plugin? I haven´t found something in the link/image plugin. Maybe someone can help? :-)

If this is somehow possible a last question would be if I can set different types for the file manager? (Not only image, flash, link)

Thanks in advance,

Simon :-)