Hi, I've been trying to do this, but can't get it to work. I've got a ZClass called OPImages. Like a normal image, but with some extra fields (like alt, etc). I want to call this not from the drop down list, which works fine, but from within a form action method (there are other things being called at the same time). Can anyone explain it to me? I've tried the following: <dtml-call "OPImage_add(objectname, file, title=thetitle)"> <dtml-call "Products.OP.OPImage_add(objectname, file, title=thetitle)"> <dtml-call "ControlPanel_Products.OP.OPImage_add(objectname, file, title=thetitle)"> Plus, all of the above with expr= and all with the variables being _.getitem('x') The zope books gives the impression that the first of these should be the one that works, but I can't get it to. Any help would be greatly appreciated! Di