I have a Sony Ericsson K810i with the current Software information:

R8BA024
prgCXC1250902_ORANGE_SM R8BA024
EROM: R3A022
prgCXC1250616_EROM_DB2020_HB106GENERIC_FOTA_SIMLOC K_FLAFLA_SIBLEY_SEMCUSB

Customization:

CDA102779/54 R5A cxc1250813 R8BA024 ORANGE_GEN

It is already unlocked, but it is still branded on Orange Romania.

I wish to debrand it using:

XS++ 3.1
Flash drivers: SE-lifestyle USB Flash Drivers
K810_R8BA024_FS_CENT_EUROPE_RED52.fbn
K810_R8BA024_MAIN_GENERIC_SM_RED52.mbn
HB1-06_Gen_CDA102568_2_R8A_GENERIC_CENT_EUROPE

My XS++ told me that I have:

DB2020 CID52

and the log:

10:51:27| TURN OFF PHONE!
10:51:27| Hold 'C' button on phone and connect phone NOW.
10:51:27| You have 30 seconds...
10:51:27|
10:51:27| Baseband ID: 9900
10:51:27| Protocol Version: 3.1
10:51:27| Warning: IMEI name does not match GDFS name (IMEI:NULL GDFS:K810)
10:51:27| ...using GDFS name
10:51:27|
10:51:27| Profiling SEMC phone...
10:51:27| Platform: DB2020
10:51:27| OTP CID: 51
10:51:27| EROM CID: 52
10:51:27| EROM Color: Red
10:51:27| IMEI: 35315302xxxxxx
10:51:27| Phone ID: K810
10:51:27| Region: ORANGE_GEN
10:51:27| CDA: CDA102779/54 R5A
10:51:27| Firmware Version: R8BA024
10:51:27| EROM: R3A022
10:51:27| Ready for operation!
11:07:10|
11:07:10| Sending db2020_cid01_prodid_p3j.bin...
11:07:10| Applet ID: 070129 0950 NGUCXC1250330_DB2020_PRODUCTIONIDLOADER_P3J
11:07:10| This is a PRODUCTION_ID loader
11:07:11|
11:07:11| Sending db2020_mem_patcher_cid52_r2a006.bin...
11:07:11| Applet ID: 061205 1523 HANCXC9876543210_DB2020_MEM_PATCHER_R2A006 0
11:07:11| This is a MEM_PATCHER loader
11:07:11|
11:07:11| Sending db2020_cid52red_flash_r2a005.bin...
11:07:11| Applet ID: 061201 1314 HANCXC1329129_DB2020_FLASHLOADER_R2A005
11:07:11| This is a FLASH loader
11:07:11| Sendinging shutdown signal to phone...
11:07:11| Done.. You may now connect again...
11:07:11| Shutting down...
11:08:53| Shutting down...


Questions:

1. Is it safe to use these firmwares?
2. Must I use the customization or can I just do it without using it?
3. Using this will I have romanian and english languages?
4. Are the firmwares that I chose, the best for my phone, or are there any better ones and which are these?

If you have some download links it would be very helpfull.

Thank you very much for your help.