Hi everybody

I want to extend the project module and make a new menu item that shows the project.project data in a listview but with other fields.
The default project listview looks like this:
http://i.imgur.com/II0O8PW.png

I now want to create a second menu item that also shows a listview but with other field names. It should show me the name and some of my custom fields (such as x_internal_ip and x_external_ip).
How exactly should I do this? I've coded the second menu-item and the view but if I change the fields in the arch of project.project it reflects on both the project.project views that I now have.

My custom code:

<!--CUSTOM-->
    <record id="project_detail_tree" model="ir.ui.view">
            <field name="name">Details</field>
            <field name="model">project.project</field>
            <field name="arch" type="xml">
                <tree string="Details">
                    <field name="x_name"/>
            <field name="x_number"/>
            <field name="x_vm_name"/>
            <field name="x_internal_ip"/>
            <field name="x_external_ip"/>
            <field name="x_port"/>
                </tree>
            </field>
        </record>

        <record model="ir.ui.view" id="course_search_view">
            <field name="name">project.project.search</field>
            <field name="model">project.project</field>
            <field name="arch" type="xml">
                <search>
                    <field name="name"/>
                </search>
            </field>
        </record>

        <record model="ir.actions.act_window" id="project_course_action">
            <field name="name">Details overview</field>
            <field name="res_model">project.project</field>
            <field name="view_type">form</field>
            <field name="view_mode">tree,form</field>
        <field name="arch" type="xml">
                <search>
                    <field name="name"/>
                </search>
                </field>
        </record>

        <menuitem id="detail_menu" name="Details specifications" parent="base.menu_main_pm" />
        <menuitem id="project_details_menu" name="Details configuration" parent="detail_menu" action="project_course_action" />

The thing is that my code from project.project.tree is combined with the code of the default project.project tree code there is, which looks like this:

<record id="view_project" model="ir.ui.view">
            <field name="name">project.project.tree</field>
            <field name="model">project.project</field>
            <field name="field_parent">child_ids</field>
            <field name="arch" type="xml">
                <tree fonts="bold:message_unread==True" colors="red:date and (date&lt;current_date) and (state == 'open');blue:state in ('draft','pending');grey: state in ('close','cancelled')" string="Projects">
                    <field name="sequence" widget="handle"/>
                    <field name="message_unread" invisible="1"/>
                    <field name="date" invisible="1"/>
                    <field name="name" string="Project Name"/>
                    <field name="user_id" string="Project Manager"/>
                    <field name="partner_id" string="Contact"/>
                    <field name="parent_id" string="Parent" invisible="1"/>
                    <field name="planned_hours" widget="float_time"/>
                    <field name="total_hours" widget="float_time"/>
                    <field name="effective_hours" widget="float_time"/>
                    <field name="progress_rate" widget="progressbar"/>
                    <field name="state"/>
                </tree>
            </field>
        </record>

What is the solution to make a second view with data from project.project in a second tree view?

Thanks
Yenthe