You ask for K700, then you say it's K770 ???
Use FAR with JDflasher plugin from here (step 2.) : Flash K800 CID53 with K810 software CID53 (for begginers) - Top Sony Forums and read 9, 10 and 11 then open:
tpa/preset/system/desktop/flash - here move *.swf file
tpa/user/theme - here move *.thm file