ssw2rest is present in a folder called "make rest" in setool
usage
ssw2rest uncrypted_ssw_file.ssw addr (for the ssw file rename your main file(mbn) to .ssw)
where
addr=440a0000 for k750/w800/w700
addr=44140000 for all sibley phones (w810,w300,etc)
I am sorry i dont know is your mobile a sibley or not.......