Our installer need to support 32/64 bit OS, and also for AMD64 CPU. All components are 32-bit. As instructions I searched from KB, I added "Intel,AMD64;1033" as the value of "Template Summary" property. It builds OK. But when I begin installation on 32-bit XP, the installer always complains it can not open the install package and it is not valid Windows Installer package.
While I remove "AMD64" from the TS property, and tries on 32-bit XP, everything is fine.
As stated on Heath Stewart's blog, Intel, x64, and Intel64 are mutually exclusive. This can be extracted from the documentation, but I do agree it's not the easiest thing to read. So you need to remove Intel, and change AMD64 to x64.
