I will be completely honest in saying i have not tried the transfers i don't think i've gotten to the transfer window yet i'll see when i get there and to configure the starting teams in the world league you would have to open up the 2de97b250f07a369610d6087471b7aad file and replace the team_ID and the team name and that should work. You were saying something about good players (assuming star players with a star ability) getting replaced by a poor player i think that is caused because in the original game there were no star players in the starting team's line-out. Best thing to do is as you said change the starting teams make sure they don't have a star player in any of the teams and then play the world league as you would and buy the star players
I usually just change them through notepad and it works fine before, But i wonder what you have to change them, perhaps it might fix a few thing's i've failed with before.
Ok, I usually open the file be29 ... with the program HxD and then I look for their names that I want to modify and then replace the name