Well, I'm still loading stuff to my P4 runtime and still using pbooost to organize it a bit. P5 is linked on my machine for everything other than the native stuff in P5. The reason for this is because I still use P4 and don't want to ditch it just yet. When P5 stabilizes to the point where P4 just isn't needed any more then I suppose I'll break up the runtimes into sub sections so that its easier to navigate. Like have a .mat runtime instead of a zillion mat folders in the poses directory. So I use pbooost heavily for that 'spring cleaning' every so often that is needed in the libraries. I think even if I had P5 only I'd still use pbooost because its a real easy file navigator to use with the runtime. The only drawback for me is that I'm one of those FAT32 NT guys so the switch banks doesn't work.