We have another knowledge resource for Project System tha is the SAP Wiki for Project System.
I've seen some SCN spaces listed the related Wiki link at the first page, but not for this space. I think we should aware of this knowledge base and use it properly to enreach our knowlege and share knowledge with others also.
The link is:
Project System (PS)
Different with posts or documents, the Wiki is more systematic, it may easy to find what you want by navigating the page structures.
Just want to share it and hope we can improve the efficiency of its use.