Here is one set of instructions on setting on point:
http://www.quilterscache.com/H/howto...triangles.html
It gives the calculations and a chart for all sorts of block sizes.
hope this helps! I know it is frustrating to see something and not be able to learn how without paying a lot or driving to every store.....
But setting on point is a pretty common technique, so I am not sure they would even give you much instruction to do so in their pattern. Maybe sizing for those specific blocks. But if you are doing a different sized block, it won't help you too much without the calculator/chart above.
eta: and if you can visualize the blocks not on point, you should be able to do all but the outside triangle blocks... I would get some graph paper and once you know the finished size of the inside blocks and pieces, those would be the same..you would just need to add a seam allowance width onto the black squares...hope that makes sense....r