A few other quick recommendations, generally when I install things that I purchase or downloadI go through my runtime immediatly thereafter and rename the folders.  Many artists have a really annoying habit of putting things in "vanity" folders, a folder with there name one them.   Hey, I'm all for giving an artist a bit of credit for there work, don't get me wrong, but folders named

!!! Insert Artist Name Here

Really don't tell you much about what the content of that folder might be.  It's not so bad right after you first install something, but it gets pretty bad 6-8 months down the road if you haven't used it in a while, your going back through your runtimes trying to remember where it is and you can't find it to save your life.  Your stuck trolling through all the vanity folders trying to figure out what is what.  So my advice is to always check what you just installed and rename the folders to something intuitive, something you'll recognize a year or two from now.

Also when it comes to clothing and hair in particular a lot of times the artist will name the folder in figures or hair one thing, and the folder for mat files something completely different, making things a real bear to find later on, so I always give the folders in the figures/hair/props directories the exact same names as the one in the poses directory, so I can find my mat files for those items fast and easy even if it's something I haven't used in ages.

Next tip, when your renaming directories get rid of all those ! type symbols that so many artists just seem to love sticking at the front of there directory names so that they'll appear at the top of the directory listing.  It's a whole ton easier to find things if there in alphabetical order, especially again if it's something you don't use often or haven't used in a while.  Also get rid of all the silliness in front of the name like "MAT XXXX" - of course it's a mat file, it's in the pose directory after all.  If by chance the item has both mats and poses in different directories, I generally either combine them into a single directory (if it's going to still be small enough to navigate easily) or make two new subdirectories under the directory with the items name - one for Mats, the other for poses.  Again it's a big time saver because everything in the main directory will have a descriptive name and be in alphabetical order.

Final tip, I made a special runtime called "install" that allows me to install things into the runtime folders and peruse them in poser (or you could use another aftermarket program like p3do explorer I suppose) so I can see where everything goes when it's first loaded.  I rename the directories in the install directory to my liking, then I move them to the actual runtime into which the item will be installed.

This makes thing much easier to install overall, because after I move the subfolders under the install directory it's blank again, and ready to be used for the next item.  That way I'm not struggling to find the new install and all it's directories in a larger runtime since odds are good it will be poorly described and or out of alphabetical order when it's first installed.

This also allows me to easily spot things like readme files or pz3 scenes and the like that are often installed with the program, the ones I feel I might need again at some point I can copy into a special directory I have under my main poser programs directory for "valuable" read mes.  The rest just get deleted, not much point in letting them take up drive space if they don't contain valuable tips or usage information I might need again.  The pz3 scenes get similar treatment, they are moved to a folder under the main poser program directory and sorted into subdirectories by type of scene, making them all very easy to find later when I need them.

Hope that helps, as ahudson mentioned when it comes to runtimes everybody has there own individual methodology, but aside from those tips I have only one other suggestion, keep your main poser runtime as uncluttered as possible, in fact don't install anything into it that you dont' absolutely have too.   The more that is installed in posers default runtime, the more memory the program uses and the longer it takes to load.   Not entirely sure why, I think it might be building some sort of index for "fast file" searching with it's default runtime and storing it in memory, but for whatever reason the bigger that default runtime gets the more memory poser takes up and the less you have for important things like rendering.

So pretty much everything I have is in an external runtime, when I get around to getting V4.1 I'll install that in the main runtime since it's required for V4.1 to get some of her special features to work properly, but the only thing in my default poser runtime is the stuff poser installs there by default when it's installed.  Other than that it's clean as a whistle.

Hope that helps!

Stepdad