Here's a very oversimplified way to do it.
You need to open four motors in begin.vi (Open4Motors.vi) instead of the 2 motors.
You need to make the refnums agree as well.
The following would be what your teleop.vi would look like. The case structure would be the inner case that already exists and the open and get blocks would be outside the outer case.
I don't show anything connected to the rotate input, but you can add that pretty simply. Generally, you'd connect the Y-axis to the rotate input and keep both the other inputs set to 0 to use the rotate. Just add another case and feed it with a button.
This is not meant to be complete. It's more an idea what you might change within teleop.vi.