If it were in a digital form I suppose I would print it and tried
to fold it directly but if it is in a printed book, I don't know what can I
do. Do people scan and print it afterwards?
The problem is that I received a CP of a design made with a ruler and not
all of its reference points are easy to get but if you "guess" them and
make a mistake than the final model will be completely wrong and it simply
won't work. That's why I'm confused.
Maybe these links on CP's will be of interest.
http://www.langorigami.com/art/creasepatterns/creasepatterns_folders.php
http://www.giladnaor.com/cp.pdf