The following video is the best one we've seen on building your own rosin press at home. We're not familiar with the plates in the video, but the setup is basically the same as with any other brand of pre-fabricated pressing plates.
The next video shows you how to extract rosin with a hair straightener. We hope the free guide you downloaded gave you everything you needed, but if not, we hope this video can clear up any confusion.
P.S. We'd also love if you could take a minute to tell us what was lacking from out guide, so that we can improve it and make it the best guide possible (simply send us an email to firstname.lastname@example.org).