The expansions have always been downloadable upon release, when you try going into a zone you might crash and have to get your Char moved out of the zone, when purchasing an expansion you also get a specific CD-Key. The key "activates" the expansion on your account, but for EQEmu purposes, the server software doesn't check to see which ones are "activated". Without activation on live it's doubtful you'll be able to play in the new zones.
just my 2cp..
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