Apparently Hooky started playing high up on the frets from the very beginning, because the gear he was playing through was so crap (I remember something about Bernard butchering his granny's old gramophone by wiring it up through where the needle went to play his guitar) that he could only really hear himself in the higher registers.
Jumping forward, by the time New Order were using lots of synth, there was generally a programmed synth bass line (think Bizarre Love Triangle), allowing Hooky to do his melodic thing. When I first heard PCL and Low-life, for example (I was a spotty teenage drummer at the time), I never realised that a lot of the melodies/tunes/riffs/whatever were a bass, I just thought they were lead-ish synth parts, and of course the thing is that it doesn't matter what they are, what they sound like or who plays them, all that matters is the song. And as someone else above said, New Order produced beguilingly sublime creations that are far more than the sum of their parts. Things like Your Silent Face, All Day Long, Leave Me Alone, The Village.... wow.
Listen to this, with the synth bass first, and then Hooky coming in. Doesn't particularly sound like a bass. Doesn't have to. Doesn't matter.
[media]http://www.youtube.com/watch?v=Gd6P5H9ZUVk[/media]
I could go on and on about New Order. They also produced an awful lot of absolute crud. PCL contains four of my favourite songs from my teenage years, desert island disc stuff. The other four are dreadful. Complete dross.