yeah, as Akshay said, you can get the FS here:
http://topse.ru/files/cat315.html
but they ask you for a registration first.
anyway guys i just flashed my phone and everything went good! the only problem is that i still have sony ericcson links all over my phone! In XS++ 3.1 before customizing i checked the box that said "dont upload wap links" or something like that but i still have them. im on O2 and my phone is locked to that network, if that could be the problem...