Hello. So you are interested in Astral Projection ? The Silva Method is more like a Mind-Change Program or System.
But yes, if you consider that meditation can get you into astral state, this program may help you to relax easily and fast, which in turn can help you to enter the astral plane easier.
The old course, from Hose Silva, is available as a free download.
To do the course, you need to be willing to change your mind to see the world as an opportunity for betterment/Improvement. Because the opposite direction/intention (of improvement) will not work at all. (read: malicious intentions will
kick you out of the state)
The exercises require
of you to listen and understand the explanation speech beforehand, to listen the exercise before attempting anything (so that you can prepare for what you are up to do) and then do the exercises in the evening/bedtime.
If you are up only for Astral Projections/OBE, then go to obe4u.com, download the free PDF and watch the introduction video:
PS. Strip off every attempt in conspiracy (from the video) and consider it only as an selling/motivational argument. (the book is free to download and use)