Open Windows Explorer and create a new folder, i.e.: File/New/Folder. Name it something simple, like "libraries." Double-click on that folder and make another one. Name it "Poses." Put Explorer in windowed mode and size the window to less than half your screen. Open another Explorer window and put it next to the first one. Navigate to the PoserRuntimeLibrariesPoses folder. Click on a folder of poses you're not using and drag and drop it onto the dummy pose folder you just created. When you need those poses again just drag them back. Repeat as necessary. You can also do it for Characters, Faces, Lights, etc. And you can do it while P4 is running.