Help with ericsson w705 software from orange to o2?

Hi
I have the sony ericsson w705 and had to get it unlocked as it was on orange and I am with o2,
I was wondering if anybody knows of a simple way to change the menu options from orange to o2

Thanks in advance
Mat
SonyEricssonW705/R1FA Browser/NetFront/3.4 Profile/MIDP-2.1 Configuration/CLDC-1.1 model-orange JavaPlatform/JP-8.4.3

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Iv managed to find a debranding site that does this at little cost, for people with the same problem, check the following site to see if your phne is in the list
Www . WotanServer . com / en
SonyEricssonW705/R1FA Browser/NetFront/3.4 Profile/MIDP-2.1 Configuration/CLDC-1.1 model-orange JavaPlatform/JP-8.4.3

wish i could help, but i don't have that phone