[Zope] DTML abc?

All, I just have a tiny little DTML question that I can't seem to solve: Some of my object ID's contain dot's, e.g. "NicePicture.jpg". Yes, I do know Zope doesn't need (or want?) the use of extension like "jpg" in object ID's , but I have my reasons to do so. Now I simply would like to render this object with dtml-var. Al DTML syntaxes I can think of result in Zope errors, propably because Zope thinks the ".jpg" part is an object method instead of part of the object ID? Can anyone point me in the right direction? Regards, Arjan.