I've changed Sale Sharks to Wigan RLFC, replaced all of the Sale Sharks logos and miniflag to Wigans. Have done the same with Poland, changed Russia.

What you need is to edit this:

be2970b0ada8e42cf891ce60ffe69575.xml

Its in the data file.

Just change your team with notepad, but dont change logo, keep it to the original name or the game crashes if you change it as in my case