How can I see Vietnamese unicode Web page

Hi all,

Would you kindly show a newbie what need to be done to Sony Ericson W580i to see Vietnamese website.
Right now it can display ASCII and Vietnamese unicodes are shown as empty squares.
I surf around but mostly saw articles about downloading MAIN2RAW and SEFSTOOL4 to flash chinese firmware, non specifcally for Vietnamese.

My phone ID:
ChipID:9900,EMP protocol:0301
PHONE IS RED RETAIL PRODUCT
FLASH CID detected:52
Speed:921600
Flash ID check:897E
Flash props sent ok
OTP LOCKED:1 CID:51 PAF:1 IMEI:35256xxxxxxxxx CERT:RED
FLASH CID:52 COLOR:RED

Model:W580i
Brand:ATT
MAPP CXC article: R7AC001 prgCXC1123480_CINGULAR_LA
MAPP CXC version: R7AC001
Language Package:CINGULAR
CDA article: CDA102774/102
CDA version: R17A
Default article: cxc1123364
Default version: R7AC001

Network LOCKED
Operator: MULTIPLE

Here is what I tried:

I am not sure about the correct procedure and file name, but I just pick

W580_R6BC002_FS_APAC_RED52.fbn
and extract
..\w580.raw\TPA\PRESET\SYSTEM\LANGUAGE\VI.LNG

I installed setool2lt to get log ID and stuck from there

I don't know whether I did OK so far? If so, How to upload the VI.LNG to the phone?
Can someone show me please?