How do you flash a 7210?

I live in Canada and guess what? Nokia doesn't offer ANY support for the phone regarding firmware because the phone isn't released in Canada! They won't even flash my phone because they don't have the firmware for a 7210. Talk about boonyville. As a last resort, I want to flash my own phone.

Okay, I've seen all these programs and files... and I've downloaded them. I have the DCT-4 program which I quite don't understand and I have this file which has the flash files for the 7210.

What are the steps exactly to flash a phone? What do you need? Has anyone tried what I'm about to go through?