Replacing rotors on '93 90CS

[Elliott Potter <epotter@abraxis.com>]

I'm going to need to replace the rotors in the front and rear of my 90
CS, but am having a little trouble figuring out exactly how (there's a
first time for everything!)  Looking through the repair manual, there
are detailed instructions on how to replace the pads, but none on how to
take off the rotors.  I did, however, find some pictures in the axle
assembly section that looked promising, but they seem a little too
simple:

Front axles:  It looks as though there's a single bolt/washer that
screws into the Axle shaft, through the wheel bearing and wheel hub. 
Can this be correct?  One bolt?  Also, it says "loosen/tighten ONLY with
vehicle on ground."  Well this just doesn't seem right--especially if it
attaches the wheel to the axle!  How is one meant to support the car?

Rear axles:  This looks much more simple, though it is the same idea as
the front:  There's the Stub axle that attaches to the axle beam, and
this sticks through the splash guard, inner wheel bearing, rotor, wheel
hub, outer wheel bearing, etc. and ends with a large nut.  The biggest
question the illustration brings to mind is that the rotor they show is
the same diameter as the wheel hub!  It looks like it's in the right
place but I'm not exactly sure.  At least this one doesn't insist that I
remove the bolt while the car's on the ground!  Though in this one it
seems less likely to do damage.....

Elliott