Dual iTunes Libraries Streaming From A NAS

As what I'm trying to accomplish is fairly complex, I've included a diagram.

I'd like our family to move completely to a digitized library so that we don't have to deal with disc media any longer. Plus, we might be able to get rid of satellite, but that's irrelevant right now.

I want to move to Apple TVs for this, but the setup is kind of complex, so I'd like to get some input on what I'm doing right and wrong and any tips you'd have on making this setup work.

So we have our AirPort Extreme which currently only handles Internet access to our family iMac and my Mac Pro and MacBook Pro. We'd be buying three Apple TVs (one now and two of the next model that can handle 1080p out) and streaming two iTunes libraries between them.

Each library will be held on its own hard drive in an LG NAS connected via Ethernet to the AirPort Extreme.

Library 1 is kids' stuff (music, movies, TV shows, etc.) and will be pushed to the A4 Apple TV.

Library 2 will be everything else and will be pushed to the A5 Apple TVs when they start existing. I'm waiting for the next model because of the large amount of 1080p content I have that I don't feel should be downconverted.

This LG NAS is a bother, however. It formats its drives NFS, so OS X can't write to them. This leads me to believe that the Apple TV won't be able to even see these drives, much less the iTunes libraries contained within them.

I guess my list of problems is thus:

1. Get this stupid NAS to give me a writable drive format.
2. Figure out how to structure the iTunes libraries on the hard drives so that they can be read/seen by Apple TVs (I figure it's the same folder hierarchy as iTunes on a computer, so if it is, I can test without much worry).
3. Find somewhere that will take back an open Apple TV without a restocking fee if it can't see the libraries on the network.

And probably half a dozen other things of which I haven't yet thought.

Any help would be appreciated.

Uh, you don't have to do that. At all. It takes in 1080p files in iTunes and downconverts them itself.

Also, in response to everyone else, I'm a complete idiot ("yes, you are," they say). Parental controls exist for a reason. I don't have to fiddle with two iTunes libraries, I can just turn parental controls on for the A4 Apple TV.

Now if I have this correct, I have to have some sort of computer running iTunes (instead of my original setup idea) for the Apple TV to even see the NAS' library, right?

So I'd have the network set up like it is in my picture, but instead of the AirPort sending signal directly to the Apple TVs, it would be informing my computers of the existence of the NAS' iTunes Library, which would be the Library to which I'm connected in iTunes that the Apple TV would look for when looking for computers.

Right? : For something as simple as the Apple TV is supposed to be, this seems needlessly complicated. The Apple TV should be able to see network iTunes libraries if they have the proper files in the main folder...