Well, I've finished. It took a little longer than expected, but it wasn't all that difficult. The hardest was getting the tie rods off the steering rack, I used the folloing arrangement to achieve it:

It really is just well applied brute force. A little tapping here and there to loosen things up may have helped me, and they came off in the end. Also, they are just about as hard to get back on tightly

I had some difficulty getting the lower hose reattached to the rack - for some reason, the thread just wouldn't bite - so I had to undo the screw holding a securing bracket in place to get a little more movement in the hose line, and then it went in fine.
Also to note, I found it easier to remove both wheels, and I took the rack out of the passenger side, rather than the driver's side, as Jono suggests.
Oh, also - the mating marks need to go on the universal joint and the spline, not the rack outsides >_< now my steering wheel is at a slightly different angle. Also, when replacing the rack, don't do up the mounting bolts all the way until you've put the spline back in the universal joint.
Also, don't forget, you'll need new power steering fluid

Thanks again for the excellent advice, Jono.