Multiple Half square Triangles
 

I have tried the method you are refering to and my hst's didn't hold their shape and some stretched while I tried to sew them together. However I have been using the method Eleanor Burns uses to make multiple hst. Here is a link that you can watch to walk you through her method. She uses the method alot so you can pick almost any video with hst's and see how it is done. Hope this helps.

http://vimeo.com/album/1321436/video/15469320

If scroll down on the page you will see to the right where it mentions videos, groups, channel and album. I usually choose videos. Then watch and learn how she does different technics. I just finished a top that I call "HST Stain Glass" 8 different panels. I sewed 8 sets in less than an hour and a half. Got 104 hst. Then used a square up ruler to square all of them up. I will post a pic later when it is all together.