New Battlenet Account - how to create 5 accounts to 1 battlenet account

[Zork]

You can create the new bnet account and then Recruit A Friend (RAF) the other 4 accounts in-game by clicking the little person silhouette icon by the chat window. A dialog box will open and there is a "RAF" button in the upper right corner, I think it is a shaking-hands icon. Each license/RAF will be pointing (i.e. pet-rewards/granting levels) to the account you sent the RAF request from; so if you want to A->B->C->D->E then all would be RAF'd from the main account, otherwise log on to each account as each trial is downloaded and do the same for subsequent accounts.

You can then log on to your battlenet account under 'account' and either d/l'd MoP or enter a key from a store bought game.

If you are talking about retrieving your existing bnet account, then you'll have to contact blizz: http://eu.battle.net/wow/en/forum/topic/2226264121
And then can do the above with your old existing account.

EDIT: each RAF will need to be sent an e-mail, so you just enter your bnet e-mail.