So, the Cataclysm launch is a few hours away. I have typed in the key found inside the Cataclysm manual or cover (I don't remember where it was written) so my account is now Cataclysm-ready.
I'm waiting for some patching right now, about 800MB of files to download that suddenly appeared. Note that those 800MB did not appear because I typed in the key. I typed in the key yesterday and when I launched WoW earlier today, it said it was up to date.
Is there anything I need to install from the DVD? Or will the launcher patching take care of everything for me, provided I let it download and install everything?