Amen.
I finally found a link to a page with a working hack for Final Fantasy XI. The program will allow the players to finally be able to alt+tab again and play in a window.
Yes, I fully support hacks when they have no impact on the gameplay and when they are about an option that should be directly in the game.
What is wrong is that I have to search the help of an hacker and break the TOS to solve glaring issues.