Should still be the same as before. Is the AoRK map that you're trying to install not showing up on the map window list of installed maps or are you getting some kind of "can't load" error? Couple of things to check:
The map needs to go into a "AoRK" sub-folder inside the PlanetMap folder. Depending on how you open the package, you lose that folder.
You can try to manually change your map setting using a chat window command:
/setoption PlanetMapIndexFile AoRK/AoRK.txt
If your "Anarchy Online" folder is in the "Program Files" or your "Desktop", you might be hitting some kind of UAC setting that prevents files that you add to the cd_image/textures/PlanetMap folder from being visible to the application. It's best to install Anarchy Online into some unprotected location like "C:\Games" or something like that.
You might want to consider using Saavick's new RK map which is more up-to-date compared to AoRK, which hasn't been updated in some time. You can download it here:
http://www.ao-universe.com/index.php...aps%2F&lang=en