Edited:
After installing custome pack for indonesia:

09/10/2012 19:50:00 ChipID:C900,EMP protocol:0401
09/10/2012 19:50:01
09/10/2012 19:50:01 PHONE STATE: "RETAIL"
09/10/2012 19:50:01 FLASH CID: 0052
09/10/2012 19:50:02 OTP LOCKED:1 CID:52 PAF:1 IMEI:35705302212200 CERT:RED
09/10/2012 19:50:05 LDR:2008-07-23 12:02 CXC1250779_DB31XX_EXPLORER_LOADER_APP_SDRAM_R2A065
09/10/2012 19:50:05 LDR CAPS:SYSTEM FLASH GDFS FILESYSTEM TA
09/10/2012 19:50:05 LDR:2009-04-21 18:09 CXC1250843_DB31XX_CS_LOADER_ACC_SDRAM_R2A081
09/10/2012 19:50:05 LDR CAPS:SYSTEM FLASH SIGNATURE AUTH
09/10/2012 19:50:10 Writing package "C:\Documents and Settings\m.andito\My Documents\Downloads\Programs\Flashing Sony Ericsson W902 dito\W902_1212-7148_R3A_Customized_Indonesia.zip"...
09/10/2012 19:50:10 /tpa/preset/custom/CONTENT_DOWNLOAD_HOOK.itm
09/10/2012 19:50:10 /tpa/preset/custom/Customize.xml
09/10/2012 19:50:10 /tpa/preset/custom/FM_PICTURES_HOOK_3.itm
09/10/2012 19:50:11 /tpa/preset/custom/FM_SOUNDS_HOOK_3.itm
09/10/2012 19:50:11 /tpa/preset/custom/FM_THEMES_HOOK_3.itm
09/10/2012 19:50:11 /tpa/preset/custom/FM_VIDEOS_HOOK_3.itm
09/10/2012 19:50:11 /tpa/preset/custom/GAMES_HOOK_3.itm
09/10/2012 19:50:11 /tpa/preset/custom/MC_MUSIC_HOOK_3.itm
09/10/2012 19:50:11 /tpa/preset/custom/MC_PHOTO_HOOK_3.itm
09/10/2012 19:50:12 /tpa/preset/custom/MC_VIDEO_HOOK_3.itm
09/10/2012 19:50:12 /tpa/preset/custom/ORG_APPLICATIONS_HOOK_3.itm
09/10/2012 19:50:12 /tpa/preset/custom/preloaded_config.xml
09/10/2012 19:50:13 /tpa/preset/custom/SETT_RINGTONE_HOOK_1.itm
09/10/2012 19:50:13 /tpa/preset/custom/SETT_SCREENSAVER_HOOK_1.itm
09/10/2012 19:50:13 /tpa/preset/custom/SETT_STARTSHOW_HOOK_1.itm
09/10/2012 19:50:13 /tpa/preset/custom/SETT_WALLPAPER_HOOK_1.itm
09/10/2012 19:50:14 Phone detached
09/10/2012 19:50:14 Elapsed:28 secs.

it works! Thanks!

But those indonesian pack seems like have no indonesian language on it, so my phone doesn't have indonesia language. hehehe... :)
THANKS!