Creating a sub-page that updates without affecting the containing page
I am using a data master page that creates a viewlist page. I am continually changing the data master page as I develop the data requirements, and this regenerates the viewlist page. However i have customized the viewlist page, so those customizations disappear each time I regenerate the data master. Is there a way to have the viewlist page appear as a sub-page on a page that has the customizations, so that I can continually make changes to the design of the data master, create the viewlist page, and not have to redo the cusomizations.