Tyria, Cantha, Elona????????????

hello, i own GW EN and the origianal guildwars. I was wondering what the difference was between these three zones and if you have GW EN do you have access to all of them

Thankyou

Basically the difference is the three games...

Prophecies is Tyria
Factions is Cantha
Nightfall is Elona

GWEN does not give you access to campaigns you do not own.

if i have a person in Prophecies can i play him in factions or nightfall?

your prophesies chars can go to factions areas and nightfall areas once u buy factions or nightfall.

Yes, you can. When you buy Factions/Nightfall, make sure to add the access keys to your existing account. Once you do this, there will be some new quests for you in Lion's Arch that will let you take your Prophecies character to the other games. Once you do these quests, you will be able to move your characters freely between the games at your leisure.