Create a layer named DS and make it the current layer.
Create a box (140cm | 55" | 4'6") tall.
Copy and paste the box around your scene where you would like to place cameras.
Open Named Views
View->Set View->Named Views...
Set View tab
Enter the Set View tab.
Place camera and target
Right-click on the Place camera and target tool inside the Set View tab.
Click on two corners
Using the place camera and target tool, click on two corners of one of your boxes to place a camera.
Turn off DS Layer
Your viewport should be looking straight.
Turn off the DS layer.
Save Named View
With the DS layer turned off, save this view as "DS_01"
Repeat at every box
Turn DS layer back on
Place Camera and Target on next box
Turn DS layer off
Save named view "DS_number"