That sounds very technical, yet I think I can handle it...
Buuuut... wouldn't that then make FFXI try to minimize or at least loose fullscreen status? Because when that happens, FFXI gets VERY pissy. And there's no way I can RUN in a window (with a window hack): My macro needs FFXI fullscreen for isobject locations. I've never been able to successfully leave FFXI via a system command and return (eg: alt-tab, alt-enter, etc...) I suppose I COULD exit to the playonline shell. From there I CAN alt-tab... But that would be a huge pain in the arse.
...Or does what you described NOT disturb the fullscreen lock FFXI likes to have?