i don't know why i don't know this answer off the top of my head but I also cant find it anywhere...
Where will Pd look first? ~/Library/Pd OR /extra? And if it finds the same lib in ~/Library/Pd AND /extra which will it load? I was just thinking because I have some libs in ~/Library/Pd that are also present in /extra but have been altered. I was hoping they were taking precedent loading over those that come with extended. Anyway.... that info should be here maybe?
http://puredata.info/docs/faq/how-do-i-install-externals-and-help-files
unless its already somewhere and im looking in the wrong place.
cheers m