1. View | Network
2. Format | Box Styles
Next to data template: click "More templates"
In the pop up, click Standard and then click the Copy... button.
In the new pop up, click on the Cell Layout button to modify the number of rows/columns in the box displays and click OK.
Back in the first popup, choose the blank cells and add Early Start, Early Finish, Late Start and Late Finish (remember to put an entry in the "Show Label in Cell" box.
See! Easier than you thought.