I know everyone is going to be really irate about reanimating the zombie, but it has just taken me a good hour and a half to reattach the bloody covers and hood to the car seat after washing it for our impending newborn and there is a dearth of information on the internet on how to actually do it.
For the canopy,
1. open the plastic rim by pressing the grey button behind the head of the carseat and pulling outwards.
2. attach the loops on the top of the hood to the hooks on the carrying handle. I kept the handle in the upright position.
3. tuck the bottom edge of the hood into the plastic rim
4. there are no hooks to reattach on the bottom edge of the canopy. If you turn the chair over you can see that the plastic rim ends in a slotted shape. The elastics are sewn into a v shape and simply slide into these slots (from inside the rim outwards). The v shape holds them in place.
5. push the plastic rim back into place.
Again, sorry for the zombie thread reanimation, but thought I might save someone else the frustration. It may well be that everyone else in the world is clever enough to have worked this out without any problems! I am, in my defence, very pregnant and quite grumpy about it.