Are you sure about that? I ask becouse on the earlier modles the disk was bolted to the rear of the hub. Requiring the whole thing to be dismantled to get it off. Is this not the same on the later modles? On most cars the disk just goes over the studs, with a couple of retaining screws. But not all.
If I'm right (and having a good look with thw wheel off will show if I am) then you will need to:
Remove the break caliper as antraxx69 said.
Remove the end cap of the free wheeling hub (FWH). 6 small bolts. Have the FWH in 'free' position for this, or you'll probably get the thing stuck and end up witht he spring inside falling out of it's housing. Not a majour problem, but fidilly to get back together.
Remove the circlip around the end of the half shaft inside the FWH.
Unbolt the FWH body. 6 medium size bolts.
Remove the big nut from inside the hub (behind the removed FWH). You'll need to bend the locking washer away from the nut first.
Remove the locking washer.
Remove the second large nut.
Slid the whole hub asembly off the stub axle.
Lay the hub face down and unbolt the break disk from the rear of it.
Then do the whole lot in reverse.
A tip for getting the tention on the wheel barings about right when you put the hub asembly back on. Tighten the first nut up as much as you can, then back it off one flat (sixth of a turn).
To get the circlip back on the end of the half shaft, inside the FWH body, use a bolt in the threaded hole in the end of the shaft to get perchas on it. Otherwise it tends to go hide inside the FWH body, so you can't get the circlip on it.
The end of the FWH will only fit back into the FWH body in 3 positions. Only one of these alowes the bolt holes tpo line up.

Could be totaly wronge.