That's a good idea, but I guess you shouldn't use only one source. Actually, in my opinion, it's difficult to say you which is best PLR IM guide, because you can not like my choices, so here is my suggestion, create your guide dividing it in three sections:
First section, explain Google webmasters guidelines. It shouldn't be so difficult!
Second section, show how to create social presence and get backlinks (you can use PLR content here);
Third section, use some IM questions from this website as inspiration and write your own answers;
Include an appendix section, with keyword lists, websites where create some presence, etc.
It should have better result than only using PLR content, don't you agree?