I don't consider this so much a guide but more of a tip, let's say ure moving realms from A - B .... B being your destination realm..
1] Make a character with the same name as the character you are transfering from A to B on the B realm.
2] Pay for your account transfer, wait for approval. Once complete logon to your account.
3] From there go to the new realm and you will see your transfer character with the his name and numbers.. ex : (babegotback12232)
4] Try to sign onto her and you are prompted to change your name!
5] Enjoy!! You may now delete that temporary alt!
-Diseal3