Hello, I've dropped the DNNEditor into a module I'm developing but when I run the module in DNN, click on the "image editor " button, I get this error popup:

Web.Config registration missing!
The telerik dialogues require a HttpHandler registration in the web.config
file. Please, use the control's SmartTag toadd the handler automatically,
or see the help for more information: Controls > RadEditor > Dialogues> Introduction

then this:

Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable.  Please review the following URL and make sure that it is spelled correctly.

Requested URL: /dnn_600/DesktopModules/TCModules/TCCategory/Telerik.Web.UI.DialogHandler.aspx

This is a clean DNN 600 installation and all should be there, right?

Please someone advise.

Thanks

OK, did an ugly work-around by copying the Telerik.Web.UI.DialogHandler.aspx into my module folder.
However, I didn't think I should be doing this as every module will need the Telerik.Web.UI.DialogHandler.aspx in it's own folder...

The handler entries in the web.config file did not seem to work at all although all the popup editors on the DNNEditor now appear...BUT

They're EMPTY! Nothing in them and now way to find anything.

Can someone at DNN PLEASE post something advising on how to use the DNNEditor? Configuration? use IN a new module?
What is the point in having the Telerik controls shipped with DNN if there is very little guidance on using them?

Telerik themselves are not very forthcoming and I've PAID for their entire suite!

Thank you