Hello,
I currently play on XBox 360 with the Vana'diel Collection 2008 version installed. When my Ultimate Collection -- Seeker's Edition disc arrives, while I:
1) be able to simply use it to install the expansion and then play using either disc
2) be able to simply use it to install the expansion and then play only using the UCSE disc
3) have to reinstall FFXI (through POL > Install > FFXI) using the UCSE disc and then play using only that disc (or either disc)
or
4) have to uninstall FFXI and POL entirely from the XBox, then reinstall POL and FFXI using the UCSE disc?