OK. I put some pics of my little powered USB box up at http://www.asciimation.co.nz/770

The page is really crappy but hey, it's 1 am here and I should be asleep!

I haven't tested it fully yet since I am am waiting for the batteries to be fully charged first.

I can't really provide full instructions since 1, I made it up as I went along and 2, it doesn't need to be this complicated. I just like an excuse to waste time making gadgets!