F*cking asshole! I have made a manual, posted it here, but it FAILED to post. And everything was deleted. If you knew, how it is hard to write again.....
OK. To change teams, you should edit fifawc.exe, using hex editor(I recommend Hex Workshop). Your task is to replace a number of a team you want. How to know the number? The easiest way - look in FED, there are the numbers of all national teams, in WC they are almost similar. When you know the number(for example, Russia - 1357), you should convert it in HEX. You can do it, using Windows Calculator. The number of Russia in HEX is 54D. But that's not, what we need. In FIFA numbers are backwards - the first two symbols are exchanged with two last ones. And the numbers contain always FOUR symbols, but in Russia's number, for example, there is 3. So, we should add "0" there, and number looks like "054D".
We exchange the first two symbols with two last ones, and get the FIFA number - 4D05. That's, what we should search.
The list of teams, which participate in groups, begins in file fifawc.exe on sector "2510D4". To go to that sector you should press "CTRL-G" in Hex Workshop. And then you search for the team you want to replace. For example, if you replace "D003" on "4D05", this will mean, than Russia(4D05) will play in group E instead of "Saudi Arabia", and also Russia will play in group H
, because you didn't replace it there.
I hope, you understood it all?
In fact, once understood, it is very simple.