I'm looking for any guides/manuals that go into customising NetStorage,
so that I can add company logos, remove some of the features users don't
need, an maybe changing a bit of the layout (like making it appear as it
does via iManager if I'm using frames to load the site).

Does any know of any whitepapers or the likes for this? I'm ready to
start screwing around with the files myself, but I'm hoping for a more
official way of doing it; especially if any future service packs
overwrite everything I may have changed.