exactly as the title says, how do install updates to the mod? it's not automatic, is it?
also, will AGOT ever be implemented via Steam?
also, will AGOT ever be implemented via Steam?
You'll have to delete old versions of the mod, and install the new version. Generally, all mods require you to wipe the old version and install the new version.
As for "official" recognition, Martin and PDS have to come to some agreement.