[pcw]

I have a bunch of fonts in OS X that are organized into folders say A - I and J - Z and in those folders I have more folders with each individual name of the font.

What would be the easiest way to install all of the files in a one-click manner?

[proton]

Drag the whole lot into one of:
Only available to you: ~/Library/Fonts (~ is your home folder)
Available to all users on the Mac: /Library/Fonts (you'll need to be an administrator)

- proton

[- - e r i k - -]

Download Linotype Fontexplorer X. It's free and coincidentally one of the best font managers out there.

[headbirth]

I think there is also a Folder Script that when attached to your Library folder will place droped items in their appropriate folders like OS9 did.

You can also use FontBook ... check your Utlilties folder for it.