windowssdk: Fix 32-bit install issue with Powershell script.

Fix the install Powershell script which populates the ExplicitLayers
registry entries.  There were 2 problems: 1) it was using newer
Powershell commands that failed on Windows 7, 2) it was trying to
populate the 32-bit data on a 32-bit system with the 64-bit Bin
folder.
1 file changed