Pboost may still exist but has been hugely unsupported for the last couple of years.  Before make app decisions, consider which approach best suites you and your needs.  Many Poser users, including myself, have settled into using multiple runtimes to house and organize content.  You can separate clothing, hair, props, etc into their own categories under their own character model.  Facilitates finding content in the long run.  Another word of advice, don't load everything you own!  You will find that most content will have very minimal use and then will occupy HD space until deleted.  I have set up a special projects runtime for that purpose alone.  Use it, render it and uninstall. 

I have not used organizational software but I do use 3D Content Installer for working zipped content into their appropriate runtime folders.  The program maintains text logs of all installs for easy uninstallation later on.