I posted earlier last sept when I went through MM withdrawal. After months I found this wonderful site that at least makes itunes 8 palatable: http://dougscripts.com/itunes/
I haven't coughed up the money yet for registering his Library Manager but hope it can load them all at the same time, right now my free version only loads 2 Libraries at a time. But at least I can load another "library" and then add that libraries playlist to my iPod with his playlist script. The duplicator script (Duplin) allowed me to find all the mac duplicates that were created when I brought over my extensive MM files onto the external drive and my 2 mac logon accounts (admin and user).
And finally, I read some posts from disappointed mac switchers. I must agree that the mac and windows are becoming very muted. I've seen comparison reviews that the up front cost of a mac is balanced by the included software BUT I was sorely disappointed. Those supposedly loaded and ready to use programs are so basic that they are rarely useful unless you buy the pro versions or search and add numerous scripts or extensions. I am however pleased with the ease of incorporating the iMac into my wireless network and plan to use it as a server eventually. But again, the basic, installed programs cannot manage files on an external drive (even when hardwired) unless you buy the pro programs or add scripts. That is especially true of my audio, video and graphic files that are stored there.