Here is the progress so far. I made a couple of brackets to mount the lights to the hanndlebar crossbrace fixings. One light is on and I've wired via a switch so that it's either permanently off, or on with low beam, or on with high beam. The second one will be wired to be on with high beam only.

I've also got an HID kit for them but the bulb clips in the light-body don't work on the HID bulbs. I might just lock-wire them on...

I've got some pics, but for some reason I'm no longer allowed to post attachements....