Please help me 
I just want know what is the function of what is the contain in that file in firmware like:
BOOTFILES
apps_compressed.bin
CSC File
FactoryFS.ffs
RC1
RC2
PFS
ShpApp.app
Please tell me 
BOOTFILES - Self explanitary, bootloader, samsungs custom kernel and code for download mode, stuff to make the phone boot.
apps_compressed.bin - not sure exactly what it contains because all additional apps are in FactoryFS File.
CSC - Havent got a clue

FactoryFS - Contains swf files, settings, APN's, preloaded java games, more I cant remember.
Rc1 file - Default gadget.swf and emoticon icons and other swf's and icons
RC2 file - first main firmware file that the bootloader loads (after the rest of the firmware files) - this is the main file RusEm hacked to give access to the patch menu.
ShpApp.app - havent a clue, its not there in star so probably corby 2's OS specific
The above is referrenced from what I know about the star's firmware files so could be different in the corby 2