So, oh yeah, for SimCity 4 co-op mode?

You have to create another shortcut for SimCity 4. Replicate all of your older command-line switches, because that'll all stay the same, but add the following one as well:

-UserDir:"C:\PATH_TO_YOUR_DROPBOX_FOLDER\Dropbox\Sim City Co-Op\"

DON'T forget the backslash at the very end. This indicates to SimCity 4 to look for a non-standard Plugins, HTTPCache, and Regions folder inside the folder designated, which I've already created. Oh, and name it "Multiplayer" or "Co-Op" so you know the difference.

Also, Megalopolis. It's huge. Like super-huge. I downloaded a custom heightmap off the internet and generated a new region huge. :P

Guess who just marathon'd Deus Ex: Human Revolution? This guy.

Holy hell, what a game. I've played the original, too, so....the fit between DE:HR and the original game was fantastically worth it.

Peekaboo!