[Zope] Referring to an image, css, etc., within a Python product.

[Zope Ista]

How might I go about that? If I have a dtml/ directory
that contains all of my DTML methods, how can those
methods refer to image files etc? 

As a specific example, let's say I have
manage_MyThing.dtml. How does that DTML object get at
myImage.gif in the same dtml/ directory?

And DTMLFile doesn't work on ZPTs does it?

Thank you.

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