We are customising a Squishdot install (using the squishdot theme demo) under Zope 2.4.3. We'd like to change the 'Department' text field to become a selectable list of pre-defined values. How can we do this?
 
We have seen this done before (the different document types in the DocumentLibrary Product is a property value made of of different 'lines' (as opposed to 'text' or 'boolean' etc.) and this is then read in as a value list when using the appropriate form for adding a document. Is this similar to what needs to be done in Squishdot? If so, where and how?
 
Thanks in advance,