Hi guys,
Sorry for repeating the same kind of question again. But, before attempting unbranding and unlocking on my W580i, I needed to confirm the following things:

1. I have a Sony Ericsson w580i which was purchased from AT&T Cingular USA.
2. Now, I have been transferred back to Mumbai, India and want to unlock it for using it in India with the local GSM operator MTNL.
3. So, kindly suggest the corresponding Main and FS firmware & custom pack applicable.
4. Also, while selecting the phone model in XS++ v3.1, W580 is not present in the drop down list, so which model should I select?
5. I have successfully backed up my GDFS & the report is as below for reference.

02:34:39| XS++ v3.1 (Darwin) Ready !
02:34:39| Executed on Microsoft Windows XP
02:35:33|
02:35:33| Attempting to open the interface...
02:35:33|
02:35:33| TURN OFF PHONE!
02:35:33| Hold 'C' button on phone and connect phone NOW.
02:35:33| You have 30 seconds...
02:35:33|
02:35:39| Baseband ID: 9900
02:35:39| Protocol Version: 3.1
02:35:39| Warning: IMEI name does not match GDFS name (IMEI:NULL GDFS:W580)
02:35:39| ...using GDFS name
02:35:39|
02:35:39| Profiling SEMC phone...
02:35:39| Platform: DB2020
02:35:39| OTP CID: 51
02:35:39| EROM CID: 52
02:35:39| EROM Color: Red
02:35:39| IMEI: 01127100xxxxxx
02:35:39| Phone ID: W580
02:35:39| Region: CINGULAR
02:35:39| CDA: CDA102774/102 R17A
02:35:39| Firmware Version: R7AC001
02:35:39| EROM: R3A022
02:35:39| Ready for operation!
02:35:52|
02:35:52| Sending db2020_cid01_prodid_p3j.bin...
02:35:52| Applet ID: 070129 0950 NGUCXC1250330_DB2020_PRODUCTIONIDLOADER_P3J
02:35:52| This is a PRODUCTION_ID loader
02:35:52|
02:35:52| Sending db2020_mem_patcher_cid52_r2a006.bin...
02:35:53| Applet ID: 061205 1523 HANCXC9876543210_DB2020_MEM_PATCHER_R2A006 0
02:35:53| This is a MEM_PATCHER loader
02:35:53|
02:35:53| Sending db2020_red52_cs_r3a009.bin...
02:35:54| Applet ID: 070410 1557 HANCXC1250562_DB2020_CSLOADER_R3A009
02:35:54| This is a CHIPSELECT loader
02:35:54| Activating loader...
02:35:54| Activating GDFS...
02:36:17| This loader is UNLOCKED
02:36:17| Resetting Lock Code...
02:36:17| Lock Code...Reset to '0000'!
02:36:17| Terminating GDFS Access...
02:36:17| GDFS operation was successful
02:36:20| Disconnected... Unplug the phone
02:51:15| XS++ v3.1 (Darwin) Ready !
02:51:15| Executed on Microsoft Windows XP
02:51:19|
02:51:19| Attempting to open the interface...
02:51:19|
02:51:19| TURN OFF PHONE!
02:51:19| Hold 'C' button on phone and connect phone NOW.
02:51:19| You have 30 seconds...
02:51:19|
02:51:23| Baseband ID: 9900
02:51:23| Protocol Version: 3.1
02:51:23| Warning: IMEI name does not match GDFS name (IMEI:NULL GDFS:W580)
02:51:23| ...using GDFS name
02:51:23|
02:51:23| Profiling SEMC phone...
02:51:23| Platform: DB2020
02:51:23| OTP CID: 51
02:51:23| EROM CID: 52
02:51:23| EROM Color: Red
02:51:23| IMEI: 01127100xxxxxx
02:51:23| Phone ID: W580
02:51:23| Region: CINGULAR
02:51:23| CDA: CDA102774/102 R17A
02:51:23| Firmware Version: R7AC001
02:51:23| EROM: R3A022
02:51:23| Ready for operation!
02:51:42| After making any changes with FSX
02:51:42| you must press the 'Shutdown' button
02:52:43| ~~~~~~~~~~ Custpack information ~~~~~~~~~~
02:52:43| Custpack: AMERICA_2 (CDA102460/101) (K510)
02:52:43| Generic(non-branded) custpack: Yes
02:52:43| Allowed languages: en, pb, xl,
02:52:43| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Software Info:

R7AC001 prgCXC1123480_CINGULAR_LA

EROM: R3A022 prgCXC1250616_EROM_DB2020_HB106GENERIC_FOTA_SIMLOC K_FLAFLA_SIBLEY_SEMCUSB

ITP SW Version: CXC 1123323 R1E.

Customization: CDA 102774/102 R17A cxc1123364 R7AC001 CINGULAR.

UA version: CRH 1069179 R3B025.

6. Can I download the firmwares from another local w580 phone. If yes, how?

Thanking you all in anticipation of your valuable help.