Manage TN schema through operator screens Is it possible

i have 2 questions to ask.

  1. To what extent can the “Trading network” schema be extended and customized? Are there specific ways that Web Method suggests we go about doing that?
  2. If we want to develop simple operator screens to manage the information in trading network schema, can we directly develop those on top of Web Methods Integration Server or do we have to go through an application server?

An early response - greatly appreciated.