You'll need a Microsoft account to do this....
Soulcalibur: http://xbox.uservoice.com/forums/298503-backwards-compatibility/suggestions/8376276-soulcalibur
Soulcalibur IV: http://xbox.uservoice.com/forums/298503-backwards-compatibility/suggestions/8376270-soulcalibur-iv
Soulcalibur V...
been meaning to post these here for about a week but i got kinda lazy..
since i've been asked to post his stuff here i'm doing so, plus i've seen others have his (or her) artworks as their avatars so i think it's appropriate :) his site has been deleted too :(
so here's the artworks of that guy...