The explanation is very long.
Check out my Israel mod to see the files you need. Send me a private message if you have any questions.
To create a flag, company logos, and bank logos you will need to edit dds files. I use Adobe Photoshop with nVidia dds plugin.
I will probably start working on a detailed tutorial soon, but it will take some time to finish.
It's Passover, we have one and a half weeks holiday, so I have some spare time...