Instead of using a completely different form, you could build a new view into your current form. This will be beneficial in a situation like this because you will have the same set of Customer data for any number of views that you wish to add. To add a new view open the View menu, choose Manage Views, and click on Add a new view in bottom of the task pane.
With this new view you can design it to display any data that you wish (such as some entered in another view) and edit/add new data. Since you already have your other form created, try copying and pasting your design from the dispatch form and rebinding the fields.
If your still not satisfied after all that and REALLY want to use a seperate form, it will take some coding. Take a look at this tutorial to get you started:
http://www.infopathdev.com/howto/tutorials/default.aspx?i=af9e48a6e43c41f4be62296a7fa0e494
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Matt Faus
InfoPath Dev Texas
Matt Faus / Microsoft InfoPath MVPQdabra® Software / Streamline data gathering to turn process into knowledge