Halo On Windows Vista

so i bought the game a few years back, installed vista, installed halo 2... did everything to maximize performance... ran like crap... (my graphics card blows) so anyway... i recently downloaded a version with patches and cracks; works beautifully, and i still get to use xp.... SO, should i try and use my subscription and log into live?
and one more thing... i usually install a fresh copy of xp every few months... how does this affect registration (will it be fine as long as no one else logs in under my registration?)

 Can i play halo 2 with xp???!

Plus get a real version of halo instead....

With the cracks, you can play XP for Single Player only. There is no known way of using XP for the Multiplayer portion. XP just doesn't have the infrastructure for the LIVE service which is only compatible with Vista and 7. I'm playing the game on my Windows 7, I would recommend using the latest OP but there are still problems with Windows 7 compatibility.

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LIVE GT: Asian Inferno
Also go by: AsiansOnFire, SpartansOnFire, and Cad.

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you cant play live on xp