You can do that by yourself and XS++.Download complete firmware and make full flash.Use this 3 files:
MAIN: K800_R8BF003_MAIN_VODAFONE_WI_RED52
FS: K800_R8BF003_FS_VFE_LIVE_2_RED52 and
CUSTPACK: you already have one and follow this tutorial XS++ 2.x Guide - Top Sony Forums - part 3 and 4




