I use a mix of PBooost and Multiple Runtimes. The Multiple Runtimes is to be taken with a grain of salt though. It basically means that everything I have that is Poser 6 specific (such as Miki, Koji, James, Jessi stuff) will end up in my Poser 6/downloads runtime, while everything else will end up in my old, trusted +50Gb PoserPRo Pack runtime, in the appropriate PBoost bank. As PBooost II now can load things directly, much like Dizzy's tool, I love it more than ever :o))

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.