You might be able to get your old account back. I believe you have to make a Square Enix Account and link your Play Online profile to it. You will need your 8 character name EX. "XXXX####", password, and a CD key from FFXI or any of the expansions you owned. If anything you can write or call their customer service and deal with that mess, but they will probably get it if you are diligent. Once that garbage is out of the way all you should have to do is enter the CD key you get with the 360 version you get on your SE account and it'll add whatever expansions you're missing. I stopped playing around 06-07 and then started back up again around 2010-2011 and still had all of my stuff, even the 20+ items I had in my mailbox from my alts.
I would strongly suggest you get the PC version if at all possible, however. It will run at max on pretty much any computer/laptop built in the last 6-7 years. All you need is a $10 CORDED USB controller and you are set. The use of Windower and Add-ons makes the game so much more accessible. There are addons that will give you unlimited macro lines, and some that if you are programming savvy can automatically perform gear swaps and ability uses whenever you perform certain actions. Also, a friggin pet Status bar! /drool. Oh, and lets not forget the IMPOSSIBLE TO GAUGE Blink-Me-Not addon. Now a days people gear swap so much that it makes targeting/healing nearly impossible. This sexy, kinky, voluptuous addon stops yourself and other characters from vanishing when equipment is changed.
The game does look like a steaming pile of eft-refuse on PC without some serious code tweaking, but Windower and the out of game options can get it to look pretty close to PS2 and I'm assuming 360.
Edited, May 12th 2013 11:58pm by DamienSScott
FFXI: DamienSlvrblade Race: Elvaan Nation: San d'Oria Server: Sylph 2002-2007, Phoenix 2012
PUP WHM PLD MNK BLU BST SAM WAR BLM 99 BRD THF NIN DNC SMN RDM 50+
FFXIV: Damien Scott Race: Duskwight Elezen GC: Limsa Lominsa Server: Ultros
DoW GLA50 ACN50 PUG50 MAR 50 Rest30+
DoH/DoL All 40+