How do I set up internal conversations between the Classic UI and the Redwood User Experience?

If you're using a combination of the Service Center Classic and Redwood User experience you can set up internal conversations to communicate between the two interfaces.

By adding a Conversations subtab SR form in the Classic UI using Application Composer, you can view a list of any associated internal conversations, reply to a conversation, or start a new conversation. If you're on the Classic user experience, collaboration messages can now be used as a substitute for SR Messages of type Forward.

1. In Fusion Service, click the Navigator > Tools > Application Composer.
2. From the Common Setup list, select Mashup Content.
3. Click Register Web Application.
4. Enter a name for the web application, such as MC_MashupContent, and then enter the URL in the URL Definition field.
5. From Objects list, expand the Standard Objects list, then select Pages.
6. On the Pages workspace, click the Actions menu, and select Duplicate to copy the Details Page layout.
7. Give the duplicate layout a name, such as MC_Layout, and for Source Layout, select Standard layout, then click Save and Edit.
8. On the Details Layout page, click the Add icon.
9. On the Create Subtab page, select Mashup Content, then click Next.
10. From the Select Mashup Content list, select the mashup you created earlier in this task and select Insert.
11. In the Edit Script field, paste in your Groovy script, and then click Next. (where does user get this script?)
12. On the Additional Layouts page, move your layout from the Available list to the Selected Layouts list, and then click Save and Close.
13. Rename the subtab as needed, then click Done.
14. Go to the Messages page, and verify that the subtab is visible in the subtab list.