How do I pre-set Media Type when using link-icon?

Hi,

the editor is running just perfectly - I even managed to set my desired folder for image uploads - by setting a session var, as was described somewhere in this great forum.

$Config['UserFilesPath'] = '/' . $_SESSION['xRelativeroot'] . '/images/'


But now I'd like to do the same thing when creating links. When when I browse the server, it always starts at the root folder and has no media type (image, file, etc) pre-set. Is there a way to pre-set the file browser to e.g. "image" and folder "/images/" just the way I did above?

Any help is very much appreciated