A quick way to do it is to print the template out as a PDF from pepakura using CutePDF. From there, I just print out a pdf at a smaller size. Not the best approach but works out fast .
As a heads up, I would print out foam templates and staple them together to gauge an accurate size. I've built Mark 7 suits for my son and daughter and found the stapling method works out best. Takes a few minutes and you can determine if you need to go bigger or smaller before starting the hardcore build. Of course I don't recommend building the entire suit this way, just major pieces so you can determine size. Keep us posted.
Best of luck boss