Debranding Sony Ericsson K800i branded by Orange Romania or other european countries

Hello!
My name is Valentin and I am a begginer in mobile phones debanding stuff.
For everyone who is kind to join my thread I have some questions regarding mobile phones branding, as follows:
- Why Sony Ericsson allow mobile phones operators to modify the original software of their phones by changing or prohibiting acces to some features of the mobile phones?
- I'm not necesary against the network coding of the mobile phones by network operators, but you can be sure that i am not happy to know that my network operator (Orange Romania by example) modify my phone original software in anyway they please.
- Finaly i'm bring to your atention the following question: How to debrand a Sony Ericsson K800i branded by Orange Romania?
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I used SETool2 Lite to read the data from my phone as follows:

welcome to setool2 lite edition v 1.06
supported DB2010/DB2012 CID49, DB2020 CID49/CID51/CID52
Loaded 51 flash descriptors
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:35731501859708 CERT:RED
FLASH CID:52 COLOR:RED

MAPP CXC article: R1KG001 prgCXC1250212_ORANGE_WI
MAPP CXC version: R1KG001
Language Package:ORANGE_GEN
CDA article: CDA102511/108
CDA version: R4A
Default article: cxc1250490
Default version: R1KG001

Network LOCKED
Operator: 226-10

Elapsed:9 secs.
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Can anyone help me (post/attchement) with the necesary files to debrand my SE K800i for Romania?

THANKS EVERYONE IN ADVANCE!
my E-mail adress: djtetei@yahoo.com