i bought an N9. i killed the OS on the second day. after a long time i figured out that my phone has different firmware like on the SIM-card tray (059L4M9). 059L4M9's region code is 280(?) or what while i got the phone with a preinstalled generic firmware what region code is 005. so i have no clue what was the original firmware, i only saw the version and the region code. then i flashed my knocked out phone with a DFL61_HARMATTAN_40.2012.21-3_PR_LEGACY_005-OEM1-958_ARM.bin and a DFL61_HARMATTAN_40.2012.21-3.418.2_PR_LEGACY_418_ARM_RM-696_PRD_signed.bin which contained my phone's CMT. now i killed my phone again cause i did an apt-get dist-upgrade what removed some serious packages from the OS...what a mess.

so now i have some questions. i really want to stop this terrible flashing game series:
1. afaik the hardware is the same: what is the difference between region firmwares? exactly 001 vs. 005.
2. i'm a European guy so if somehow possible: how the hell i can change my phone's firmware from 005 to a 001? i would like to install a 059J203 firmware.
3. what are the difference between CMTs?
4. why i need another firmware to install CMT while any other firmwares contain CMT's?