Guys, need your help

I'm developing simple app using ROO+GWT+GAE
I like CRUD pages generated by Roo but I need something different.

I want to have two items in the main navigation menu related to the one entity.
This entity has boolean flag and I want to see in one table objects with flag=true and objects with flag=false in another one.

What is the simplest way to add this to app generated by roo?

Thanks