I'm making a Zope "Product" for managing and creating student surveys (which I hope to contribute via zope.org) but I'm having trouble with a couple of techniques: 1. How does one enable a dtml file that is instantiated as in my_dtml = HTMLFile('my', globals()) available for editing in the products' management screen? There's probably more to this - as at the moment the management screen goes straight to the "index_html" form as with the "Poll" Product. 2. What's the approved way to catch database errors in methods? I'm creating tables on the fly, and need to check if the table exists before trying to create it. (I'd use a "tables" method if all the database interfaces supported it. I'd also use a try/except but the database objects have different names for their exceptions.)