1) install theme from xmb.
3) go into multiMan.
2) press [select + start] takes you to "FILE MANAGER"
4) hover to [THEMES] and pick the theme you want to use, then click on the [.mmt] file, it'll change automatically.
Well, GOW theme is done, and Dead-Space is halfway done, was thinking of releasing a batch of 3 but depending on you guys I might release GOW already, for now I'm going to sleep... 4:36am over here...