Help Change Language W910i

[fisch88]

Hi! I'm new to the forum and I hope I wouldn't ask something already posted...
I've done some searches but I only can find many dissenting opinions about doing what I need.

I've just bought on eBay a W910i from UK, unfortunately it doesn't have the italian language... the phone is unbranded and my firmware version is R1FA035 which it seems to be the latest (isn't it?).

I'd like to add the italian language (at least the T9), which is the best way?
1) change the CDA code and update with seus? (which is the CDA for italian language? Can I do this with the latest firmware already installed or does seus not accept it?)

2) flash the T9 file directly? (where could I found it? do I have to reflash it in case of new official updates?)

3) please suggest other ways

Thanks for any answer...