I literally just installed this bearing set on my bike two days ago. I've never done anything like it before, and the instructions that came with it were garbage (it honestly didn't even have install instructions), but it only ended up taking me about a half hour. I had a lot of help from shinyribs, so here are a few tips he gave me I will pass along.
1. The order of the parts from the bottom of the neck up are: spacer washer (my 550F used the thin spacer), rubber cup seal (with the rubber cup facing up, towards the bearing), bearing, race...then for the upper set; race, bearing, rubber cup seal (with the cup facing down, towards the bearing), spanner nut, top triple, stock washer and nut.
2. Keeping the old lower race is a great help in installing the new one; just get the new race started in the neck, then place the old one up against it and pound it the rest of the way in. The old race will force the new one all the way up into the neck, but shouldn't go up far enough into the neck that it will get stuck back in itself. Also, the top race should stick up out of the neck a little bit, that's normal.
3. You can put the triple and the new races in the freezer, this may help when installing the parts (I also used some lithium grease to help everything slide into place).
4. You can differentiate the lower bearing parts from the uppers due to the fact that all of the lower parts should be a slightly larger diameter.
I think that's pretty much everything. I forgot to re-route my cables and some wires around the forks before I reinstalled the forks, so I had to take the forks back off...