Read here : XS++ 3.1 Guide-Flashing, Customizing, Recovering - Top Sony Forums
and use these files:
MAIN : K800_R8BA024_MAIN_GENERIC_WI_RED52
FS : K800_R8BA024_FS_S_ASIA_LEVAN_RED52
custpack : HB1-06_Gen_CDA102568_110_R8A_GENERIC_S_ASIA_LEVAN