whats the difference between the files that topsony *.FBN & *.MBN to *.MIN *.FS

files

as much hassle as this w880i cid53 is giving me and not being able to flash with jdflasher properly (even tho strangly it flashes a w610 fileonto my w880)

the Kkclient never fails to flash there own main and FS files (53) straigt onto the phone

however they do not have a CID53 ofthe w880i


when i try use Kkclient to upload the CID53 file from TOPSONY it says, topsony file format detected, and stops