Hy, on this link I found, is completely system files from Xperia S. My self didn't yet try witch apk is working and witch not on Neo or Arc. Maybe is possible to port that files to our phone but Im not developer. Download on 29-th post.
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?