ok well apon further research into it, it would seem those are just resources like pictures for buttons and things of that nature, so that would be if we were building for multiple phones with different screen sizes, since we are building specifically for this phone all resources will be built to spec by default. so no need to worry about that i dont think
here is a good article on the subject, a little hard to grasp at first, but the general idea is that its the system generic resources resized to fit the screen, we may or may not end up using that but it wouldnt effect the ability to boot
http://developer.android.com/guide/practices/screens_support.html
go poke around in there and start viewing the png files youll get what i mean. theyre just pictures of buttons and icons for various things