Can I Activate an old account with anything other than the account number + password?

[Freek]

I stopped playing FF about 3 years ago, just recently i purchased a Abyssea collection that was on sale and tried it out but i just cant stand having to redo stuff like LB Rank and Story Missions all over again plus that everything seems so overpriced ( well to a "new" toon). I want to keep playing this game but only if i can on my old account. The problem with this is i can't remember my account and password, is there any way to see if i can get it reactivated by using product keys or any other way?

***After posting this i decided to bring my old PS2 out of storage and i was surprised to see that my account info was still there, so problem solved. Now ill have to see if a 3 year old account can still be activated.