Best to jump on you tube. There are lots of vids on how to install a headset. There are a few little tricks that might trip up a newcomer, but don't worry. It's easy. Have you got the stem, star fangled nut and a load of stem spacers?
My battery is making some progress, although not quite as ambitious as offroader's. Will either run a 12p, 20s or a 13p, 20s or a 12 p, 21s. Anyone have any idea what sort of rage I would get at 45-50km/hr?? Will be running a v3 Cromotor and maxe. Cells are Sanyo ga 3500's. Not planning on running huge current as I am aiming for reliability, maybe 60 amps or something