I am developing a plugin based system where functionality can be extended
with new webservices and handlers. However, as the handlers are contained
within .dlls and started by the main application they do not automatically
parse any own app.config files, and thus can not read any own <policy> tags.

Can I somehow programatically tell WSE to add a policy file to the overall
policy for the application, or can there be only one policy file for the
whole client (the one referred to by the main applications App.config file)?