I hope Bossland has the x64 version of this application in their back pocket because as of 5.4 it looks like Blizzard is forcing the x64 version of WOW to be used even if you select x86 in the launcher.
UPDATE: There is a workaround. If you rename the wow-64.exe file to anything else and then run wow.exe, it executes the x86 version as expected. If you do not rename wow-64.exe and try to run wow.exe, the x64 version still runs.
UPDATE: There is a workaround. If you rename the wow-64.exe file to anything else and then run wow.exe, it executes the x86 version as expected. If you do not rename wow-64.exe and try to run wow.exe, the x64 version still runs.