(Zomg teh interwebz puh lees r aftr me now!) I just figured while I'm at it I may as well blow the little extra on a valid copy.
And quite frankly, I'd do that if I were you. I used to use questionable copies, but a valid one came with my laptop and heck, it's just so much of a hassle saver. Updating the OS and all that used to be a gamble and anoying. Now I just hit the button and watch the news while the comp is working. So much easier... .
As for UI pack builders putting all the stuff into folders, in my experience, that is done to avoid confusion from users. Most people who use pack UIs don't know the first thing about addons or computers, so handing them a couple of hundred folders with weird and sometimes non describt names, is a sure way of scaring people off. Having twenty odd folders with all the required stuff in them, describt names and the visual illusion of order helps alot there.
I have something like 30, maybe 40 addons total. but my addons folder contains 380 folders. All libs and stuff that could be in subfolders, but isn't for efficiency.