I have only found one site on p-shifting and it is very vague. Any other sites I should visit on this topic? Please help.
Well, before I answer you, I would have to say, before you continue to look for this you need to seriously ask yourself why it is you are looking into this. If you are looking to P-shift for real for some reason, be aware what that is, and that the chances of succeeding are pretty much unmentionable. I took a long bit of time searching for this and researching it, and though it did give me a better understanding of myself and the world, I did not find anything that actually answered that question, and the answers I did find led to more questions. You need to be careful about the angle you come at this from, and the intensity you do so with.
Now, I can't recall the places I've seen this stuff, but there are a couple of sites that give good, detailed info. There's one that has 22 or so numbered ways in which you can supposedly P-shift (one of them being the mirror-trick-shift, which, anyone who has tried it knows it doesn't give you a real P-shift, but is worth trying), the guy there has analyzed, rated, and in most cases tried them, I really wish I could remember the site though. There are also a couple of metaphysics sites which go into hypothetical stuff about it, sometimes these go over even my head though...
All I can say (after saying think of why you're looking for this and watch out) is do a google search, other words you should try are Transformation and Shapeshift. (it's unlikely you'll find anything that gives you info that would actually be useful though)