[power-pro] question about env vars under Windows 64-bits

[quantiworks]

With PowerPro installed on Windows 64-bits, is there any need to check for 
processor architecture when executing processes with env vars like the script 
below?
Or is it unnecessary?

local PA = PROCESSOR_ARCHITECTURE

if (PA == x86) do
%programfiles%
elseif (PA == X64)
%ProgramFiles(x86)%
endif