Hi Jonathan,
for a more or less similar use case, I could not find a solution just using DocuWare Modules, so I developed a tool which grabs data from a DocuWare Table field and fills an excel template with that data.
Problem in Forms is that table fields are still not yet supported and pre-populating fields is not really possible, you can only use select lists. Everything else has to be done in Workflow.
Greetings from Germany,
Simon H. Hellmann
DocuWare System Consultant