N9 firmware binaries
 

I have a question about the binaries included in the N9 firmware.
Currently I have seen in some "flashing guides" that they only use 2 binaries "main" and "emmc", but what about the other ones included?
there is for example one named "simlock_maemo__deB_allowed2_3gstandard_bb5_multi_ asic1.bin"; does anyone knows something about them, what are they for?
I mean, those files are there for a reason, isn't it?