Linksys E4200 as an access point

At work we bought two Linksys E4200's to extend our wireless network. We wanted to use them as access points / wireless gateways instead of their normal router configuration. Googling turns up a few half-documented solutions, which might even work in case you've got a small home network set up, but I still couldn't get it to work. So I took one of the routers home, and this is what I've come up with (tested at home only right now):

1. Start the router
2. Connect a cable between your computer and one of the E4200 LAN ports
3. Turn on remote management on the E4200
4. Verify that the E4200 doesn't have a local address that belongs in your network's subnet (change it otherwise)
5. Connect a cable between the E4200 WAN port and your network
6. Connect a cable between your computer and network
7. Turn off the DHCP server on the E4200
8. Connect a cable between your network and one of the E4200 LAN ports
9. Connect a cable between the E4200 WAN port and one of the E4200 LAN ports

Now you can wirelessly connect to your network using the E4200 and you can still access the E4200 admin interface as well!

Of course this all won't be necessary when DD-WRT or other alternative firmware releases are available for the E4200, but right now this probably is the best solution.