I'm using this little program, really easy, don't need to set anything and can be even closed after you opened your game:
Gamer's Window Rellocator
last version its from 2007, but it's working flawless here.
If you are affraid to download it. Seach about it on Google. Program is very used on Eve Online and also tested by FFXIV Core community.
Edited, Oct 31st 2010 2:22pm by cquintela