Yeah, it sucks I found out I didn't have the instructions (and they're not readily available on the web) on a Friday night at midnight
Ok, so the old clamp comes off fairly easily. First up, clip the zip-ties on either side of the ignition switch that hold the clutch and brake cables captive. Then you loosen the fork tube pinch bolts, the center hub pinch bolt, and then tap the underside with a rubber mallet. They'll start wiggling and coming up. Then, you just loosen the bars/clipons/whatever (but don't take them out quite yet!). It'll be a lot easier to finish pulling the top clamp if you grab the bars and wiggle back and forth. Once the top clamp is mostly off, remove the bars, then pull the clamp off. You'll have to muck with it a bit, and eventually it'll flip over forwards, exposing the tamper-resistant Torx bolts holding the ignition switch on the bike. Remove those, and remove the ignition switch.
Pull the top triple tree off the bike, then place the LSL one on. If you're doing this with the bike on the side-stand, you'll need to jack up the bike from the front to align the steering stem hole, as the whole assembly will sag slightly with the top clamp removed. If you're doing it with the bike jacked up, and the front wheel in a stand, then this may not be a problem.
Slip the clamp down over the tubes and center step, and then start the center nut. You can use the center nut to pull down the clamp over the tubes.
This is where I stopped - I don't know how far down to go. I left mine at the second of the two alignment marks at the top of the tube, and I figured I'd get in touch with LSL/Speigler/ASB or someone who's done this to make sure I don't muck it up!