How to flash a M8800 Pixon
 

Ok I'm a bit new to this, I live in Hungary a got a Pixon for Christmas, its got branded firmware to T-Mobile. I would like to put a generic firmware on the phone!

I have downloaded firmware:

M8800XEHK4 - RUSSIA, ITALY
M8800XXHK5 - UK, ITALY, FRANCE, CZECH, HUNGARY

I understand the countries are for the supported languages, but if I flash my phone can I still use it in any country, will it add any limitations?

Finally is it possible to flash my phone manually, i.e. at my home using the standard USB cable that came with the phone? If so which software do I need? And if any what precautions should I take so I don't screw up my phone.

Sorry if I'm repeating any threads, many thanks for help in advance!