Addon support & V-Sync problems

[worldofneil]

I'm wondering if I'm allowed create my own application with a possible game overlay

Officially, no. From http://support.na.square-enix.com/ru...2&tag=users_en

2.5 Data Mining. You may not intercept, mine or otherwise collect information from the Game using unauthorized third party software.

But at the same time there are already applications that hook into the game, but I don't know much about them and I have no idea how many players actually use them. If you decide to do something like this I certainly would not recommend mentioning it on the official forums.

Sorry that I can't really help with your v-sync problem.