[Zope] DTML images and IE Method

I use IE Methods a lot (to impress laymen of Zope's ease of use), but I have problems with adding images. If I insert an image with the WYSIWYG-editor it is saved with a absolute url (C:\Somewhere\not\on\server\). I prefer using the Image object, with its benefits, but if I manually type in <dtml-var image_name_jpg> (I can _view_ it), and go to Editor mode; the image disapears and when I look at the resulting code it has been changed to <DTML-VAR image_name_jpg> Is there any way of preventing this? Solutions?