wat is differences between main n fs??
i have a r4ed001 firmware,can i flash it with other firmware??

The MAIN part of the firmware contains the SE operating sistem and the programs that run on the phone. (ok, i know it's not an "Operating system" as in what it means in PCs, but still it contains everything to startup & run the programs on the phone).

The FS (File System) contains all the files that are used by those programs. For example there you can find the drivers (display/camera/accoustics), the menu & layout files, the java games/programs, the sounds, ...

You should also say what phone you have, since just from the firmware version is hard to know what kind of phone you have.

Im using w810,it is posible to change my phone firmware to other firmware that suitable 4 my phone?

you can only flash other w810i firmware on your phone..you can not flash firmwares of other phones....

ok thanks 4 the info...what is the best firmware 4 w810 now??

the latest firmware is r4ek001
but most user have r4ea031 (is previous to r4ek001) 'cause most of the patches first are created for that FW, then ported to others ones

ok..i will try to flash my phone with the sense modpack..i will inform you guys if i have problem when flashing my phone..thankz 4 now

where is the gdfs backup file after we backup it with xs++???