This is TOTALLY FALSE. I had to reinstall the FIFA 09 after having installed this patch
I'm just warning you...
It is not my problem if the first thing you made after having some problems was to reinstall fifa. Next time come here and ask me if you have problems. The patch is a MODE and does not give problems to the main game, absolutely!
The only problem you could have was registry key problem, that could have been solved easily without reinstalling the game!!!
In my life of editer I always say: if a patch does not work, don't reinstall FIFA: ask to the author telling him what is the problem. Nevertheless there is still a good amount of people who don't listen to me and decide that the best way to fix things is reinstalling!