Does anyone know if the "(x86)" in the folder name is a requirement for a 32 bit app on a 64bit system ?

The "Program Files (x86)" folder is the default when you install 32-bit apps on a 64-bit system, but you can still install elsewhere, even on a different drive. Most likely the "Program Files" folder is redirected by the OS to "Program Files (x86)", but I would expect other folder names to be OK. More important is the Wow6432Node key in the registry. Richard MuellerMVP ADSI