[Zope-dev] ZClass Product : Make Product objects available to several Z Classes

Hi, If I have a Product called 'BEER', and in this Product are 2 ZClasses called 'CAN' and 'BOTTLE'. I want to put DTML Methods in the root of BEER, that can be called on by CAN and BOTTLE. Neither Class will find the methods when I try this, I have to have a identical copy within each ZClass for it to work. What do I need to do to make the methods visible, have I missed something with permissions? Thanks Richard