Wanting to play the Xbox 360 version (Need Help)

I brought the game on Steam a few weeks ago and been playing it on PC. But I wanna play on the 360. A friend of mine brought me the Xbox 360 version long ago just doesn't have Wing of the Goddess. If I brought the Wing of the Goddess add on for the 360 how would I go about being able to use my current account on Xbox 360 if there is a way?

once you install the game on your 360, all you have to do is input your account information into pol when you startthe game up for the first time.

Shouldn't be anything special to it.


P.S. you should stick with the PC version though, it's better.