User blog comment:GeorgePowell/Alliance uniforms ( SPOILERS)/@comment-1746153-20110611163027/@comment-108.12.227.173-20110621161002

http://social.bioware.com/forum/1/topic/103/index/2277020

This is how to mod your xbox360 save. Unfortunately, from what I've read, there is no way to mod the file that controls your suit options (as this is not stored in your saves).