Quote - It is almost impossible to try and keep track of some many runtime folders without a structured, logical arrangement that works for you.  I tend to create runtimes for projects and load content specifically used for that project.  Once done, the runtime folder is either transferred to disk and deleted off the HD or completely deleted if certain I will never go back to it.  The most used content get their own runtime folders for easy access (i.e., Poses, Props, individual characters, Themed, etc.)

Each version of Poser has it's own External Runtime to Poser 7.
Each Major FigureCharacter has it's own External runtime.
Animals have their own
Birds have their own
Vehicles have their own
Buildings their own
etc etc etc etc..............
Works very easily for me.

I never install from and exe, zip, rar etc directly to a runtime.
I expand to a blank folder.
Modify Fioler Names and Folder Tree to my taste
The Cut & Paste to an external Runtime.

I generally convert MAT Pose files to mt5 or mc6 Material Room Files.
My Pose Library is just poses and mods.

"That government is best which governs the least, because its people discipline themselves."
Thomas Jefferson