Debranding 890i Orange phone

Good evening all,

I recently bought a SE w890i, silver wich has orange software

I compared the phone with a non orange software one, and its alot nicer without the orange software, so i started googling to see if it was possible to debrand this phone, and get normal software, and it is, but i was wondering if it's possible to do it myself, or pay by phone and not paypal...

I found this forum and already tried searching alot, but i couldnt find any topic explaining how to debrand the w890i.

So i was wondering if anyone could/would help me doing this, already downloaded some software, but i don't know where to start.

My Software version is R1FA033

Friendly regards