add images from server

Hi all,

Im making a CMS, in which im using CKEditor.
It has just about all the functionalitys I need, but Im missing one thing.

I use a class in my CMS to upload images to the server. It also automaticly creates thumbnails.

Now Im looking for a plugin that allowes me to show the thumbnails to the user and by clicking it, the original size images will be added to the Editor. Is there someone who can help me with that?

Im doing ok with HTML en PHP, but the CKEditor is above my abbilities.

Thanks in advanced!

Greetings Theo