How to install Final Fantasy XI on Steam with Wine and Linux!

Requirements:

Wine 1.7+
A registered copy of FFXI to a PlayOnline/SQEX account

Instructions:

First, if you haven't done so, start up Winetricks and install Steam as a preconfigured wineprefix

Select "Use Steam" in your first window of Winetricks, then enter the DLLs.

Install DirectX 8 and DXDiag.

Launch Steam and install your copy of FFXI.

Update PlayOnline and let it complain about missing a file. Close Steam and relaunch.

Update FFXI

Enjoy