I was a late convert to Correct Reference Pro. To be honest, I thought it was just going to be a slightly better program than the free version available. However, I couldn't have been more wrong! CRPro is most definitely proving to be a superb investment, and my only regret is that I didn't purchase the program years ago. The screenshot will give you some idea of just how powerful (and useful) CRPro is. I believe there's a free trial available if you wish to check it out. The beauty of P5/P6 multiple libraries is that the decision as to how and when you are going to clean out your main runtime is entirely up to you. You can keep your messy runtime fully functional and operable in Poser, whilst beginning the process of re-structuring. I personally have adopted a strategy similar to that which your comments allude to. Instead of the tedium of brute force re-organization... I got myself into the habit of 'pleasantly re-discovering' so many items in my old runtimes that I had forgotten all about. I used such discoveries as my own call for action! "That's a definite keeper, to be moved and better remenbered!"... and very gradually what might have been tedium became a labour of love. Correct Reference Pro keeps a log and remembers all the accurately referenced items in your various runtime libraries. This means that any subsequent running of the program (after you've updated these runtime libraries) is very fast indeed. When I'm moving several items, CRPro will confirm within seconds whether I've omitted any relevant files. Absolutely brilliant and extremely powerful program! I'm glad I listened to others who advised me to purchase.